[et_pb_section fb_built=”1″ admin_label=”section” _builder_version=”4.27.4″ background_color=”RGBA(255,255,255,0)” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_post_title meta=”off” featured_image=”off” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_post_title][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”1_2″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n
Ancistrus catfish, mostly known in aquaristics by their genus name Ancistrus<\/em>, are among the most popular armored catfish in freshwater aquariums. Many aquarists know them as diligent “window cleaners” or affectionately call them Scheibenknutscher<\/strong>, Scheibenlutscher<\/strong> or simply Knutschi<\/strong>. Behind these robust, peaceful catfish, however, there is much more than just a practical algae eater: Ancistrus catfish are a species-rich, exciting group of fish with diverse shapes, colors and origins in South America. <\/p>\n <\/p>\n At Ancistrus.at<\/a>, the focus is on the animals: from compact profiles of individual species and L-numbers to background articles on keeping, feeding, and breeding. This article provides a basic introduction to the question: What are Ancistrus catfish \u2013 and what makes them so special?<\/strong><\/p>\n <\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Do you want to breed them specifically?<\/strong><\/p>\n Then start here: Breeding Ancistrus Catfish (Ancistrus) \u2013 Step-by-Step<\/a>. [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/12\/Gemeiner-Antennenwels-mit-eindrucksvollen-Tentakeln-Ingo-Seidel-600×531.jpg” alt=”Common Ancistrus catfish with impressive tentacles” title_text=”Common Ancistrus catfish with impressive tentacles” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Common Ancistrus catfish with impressive tentacles, photo: Ingo Seidel<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text admin_label=”Ancistrus \u2013 eine artenreiche Gattung der Harnischwelse” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Ancistrus catfish belong to the family of armored catfish (Loricariidae). Characteristic of this group are the bony armor plates instead of “normal” scales and the inferior sucker mouth, with which the animals scrape growth from roots, stones and other surfaces. The genus Ancistrus<\/em> is widespread in large parts of South America and inhabits very different habitats \u2013 from clear, oxygen-rich streams to calmer river sections with roots, leaves and dead wood, and even in residual waters, ponds and puddles. <\/p>\n Most commercially available Ancistrus catfish remain relatively small at 8-12 cm standard length and are considered robust, peaceful catfish<\/strong> that are well suited for many community tanks. In addition to the “Common Ancistrus catfish” ( Ancistrus<\/em> sp. “Aquarienstamm” <\/a>) there are a variety of other species and forms, some of which are referred to by L-numbers or trade names \u2013 such as Ancistrus<\/em> sp. (L 111) <\/a> or Ancistrus<\/em> sp. (L 393) <\/a>.<\/p>\n A filterable overview of described species, undescribed forms, and L-numbers can be found in the species list on Ancistrus.at<\/a>. For more in-depth practical information on keeping and breeding, this page links to the guide “Ancistrus Catfish (Ancistrus<\/em>) in the Aquarium: Keeping, Care & Breeding”<\/a>.<\/p>\n <\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_3,1_3,1_3″ admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”1_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/07\/Ancistrus-sp.-L519-400×200.jpg” alt=”<g id="gid_0">Ancistrus <\/g>sp. (L 519) ” title_text=”<g id="gid_0">Ancistrus <\/g>sp. (L 519) ” url=”https:\/\/www.ancistrus.at\/en\/ancistrus\/ancistrus-sp-l519\/” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” link_option_url=”https:\/\/www.ancistrus.at\/en\/ancistrus\/ancistrus-sp-l519\/” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Ancistrus<\/em> sp. (L519), photo: Ingo Seidel <\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/07\/Ancistrus-sp.-L508-400×200.jpg” alt=”Ancistrus sp. (L 508) ” title_text=”Ancistrus sp. (L 508) ” url=”https:\/\/www.ancistrus.at\/en\/ancistrus\/ancistrus-sp-l508\/” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” link_option_url=”https:\/\/www.ancistrus.at\/en\/ancistrus\/ancistrus-sp-l508\/” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Ancistrus<\/em> sp. (L508), photo: Andreas Tanke <\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/11\/Ancistrus-sp.-L-528-Weibchen-Ingo-Seidel-400×200.jpg” alt=”Ancistrus sp. (L 528), female ” title_text=”Ancistrus sp. (L 528), female ” url=”https:\/\/www.ancistrus.at\/en\/ancistrus\/ancistrus-sp-l528\/” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” link_option_url=”https:\/\/www.ancistrus.at\/en\/ancistrus\/ancistrus-sp-l528\/” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Ancistrus<\/em> sp. “Rio Paraguay” (L529), photo: Ingo Seidel <\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text admin_label=”Typische Merkmale von Antennenwelsen” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n <\/p>\n Ancistrus catfish cannot be confused with other aquarium fish at first glance. Important features are: <\/p>\n The pronounced tentacles of the males in particular have given the Ancistrus catfish their name and make them real character fish in the aquarium. How to distinguish males and females in detail is explained in more detail in the blog article “How do I recognize the sex of my Ancistrus catfish?”<\/a>. <\/p>\n <\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”1_2″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/12\/Ancistrus-sp.-Aquarienstamm-Weibchen-Ingo-Seidel-800×400.jpg” title_text=”Ancistrus sp. %22Aquarienstamm%22 female ” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Female of Ancistrus<\/em> sp. “Aquarienstamm” \/ Common Ancistrus catfish, photo: Ingo Seidel <\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/12\/Ancistrus-sp.-Aquarienstamm-Maennchen-Ingo-Seidel-e1764683274492-800×400.jpg” title_text=”Ancistrus sp. "Aquarium strain", male ” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Male of Ancistrus<\/em> sp. “Aquarienstamm” \/ Common Ancistrus catfish, photo: Ingo Seidel <\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text admin_label=”Lebensraum und Herkunft” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n In nature, Ancistrus catfish mainly inhabit waters in South America \u2013 such as tributaries of the Amazon, Orinoco or Paran\u00e1. Depending on the species, they live in clear, oxygen-rich streams with strong currents or in rather calm, weeded areas with roots and leaf accumulations. Common denominator: There are many hard surfaces with growth and hiding places. <\/p>\n This origin is reflected in the demands in the aquarium. Many Ancistrus<\/em> species cope well with soft to medium-hard water, as long as the water quality is stable, clean and well filtered. Typical areas in which most species feel comfortable are: <\/p>\n Details may vary depending on the species \u2013 this is exactly where the individual profiles on Ancistrus.at<\/a> help, in which origin, water values and size are compiled for many Ancistrus<\/em> forms.<\/p>\n <\/p>\n [\/et_pb_text][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/11\/Biotop-von-Ancistrus-alga-Rio-Tapiche-Andreas-Tanke.jpg” alt=”Biotope of Ancistrus alga %22Rio Tapiche%22″ title_text=”Biotope of Ancistrus alga %22Rio Tapiche%22″ url=”https:\/\/www.ancistrus.at\/en\/ancistrus\/ancistrus-alga-cope-1872\/” align=”center” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_orientation=”center” module_alignment=”center” link_option_url=”https:\/\/www.ancistrus.at\/en\/ancistrus\/ancistrus-alga-cope-1872\/” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Biotope of Ancistrus alga<\/em> “Rio Tapiche”, photo: Andreas Tanke<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text admin_label=”Antennenwelse im Aquarium: Haltung & Einrichtung” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Even if Ancistrus catfish are often placed in the tank as a “cleaning crew”, they should primarily be regarded as fully-fledged aquarium inhabitants with their own requirements. A typical Ancistrus catfish aquarium offers: <\/p>\n For detailed practical tips on tank structure, water care, feeding, and socialization, it is worth taking a look at the detailed guide “Ancistrus Catfish (Ancistrus<\/em>) in the Aquarium: Keeping, Care & Breeding”<\/a>. Many aspects that are only touched upon here are discussed in more detail there.<\/p>\n <\/p>\n [\/et_pb_text][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/12\/Aquarium-fuer-Harnischwelse-der-Gattung-Ancistrus-Ingo-Seidel-800×400.jpg” title_text=”Aquarium for armored catfish of the genus Ancistrus” align=”center” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_orientation=”center” module_alignment=”center” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n A beautiful aquarium for Ancistrus catfish, photo: Ingo Seidel<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text admin_label=”Ern\u00e4hrung: Mehr als nur \u201eScheibenputzer\u201c” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n In the trade, Ancistrus catfish are often sold as “window cleaners” \u2013 and yes, they scrape algae from windows and decorations. Nevertheless, they are not machines that solve all algae problems free of charge and on the side. Anyone who considers Ancistrus<\/em> only as window cleaners, Scheibenknutscher or Scheibenlutscher<\/strong> and does not feed them specifically risks malnutrition and frustration \u2013 for both catfish and owner. <\/p>\n A species-appropriate diet includes:<\/p>\n Wooden roots are a must: Many Ancistrus catfish regularly rasp on real wood and thus absorb components that are important for their digestion. If there is a lack of growth and additional food, even “plant-safe” Ancistrus<\/em> can start to rasp on delicate plant leaves \u2013 a topic that is discussed in detail in the blog article “Ancistrus<\/em> and plants \u2013 why some catfish go to plants”<\/a>. <\/p>\n <\/p>\n [\/et_pb_text][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/12\/Maennchen-von-Ancistrus-yanesha-frisst-an-Gurke-Ingo-Seidel.jpg” alt=”Male of Ancistrus yanesha eats cucumber” title_text=”Male of Ancistrus yanesha eats cucumber” url=”https:\/\/www.ancistrus.at\/en\/ancistrus\/ancistrus-yanesha-neuhaus-meza-vargas-herrer-lujan-2023\/” align=”center” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_orientation=”center” link_option_url=”https:\/\/www.ancistrus.at\/en\/ancistrus\/ancistrus-yanesha-neuhaus-meza-vargas-herrer-lujan-2023\/” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Male of Ancistrus<\/em> yanesha<\/em> on cucumber, photo: Ingo Seidel<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text admin_label=”Fortpflanzung: produktive H\u00f6hlenbr\u00fcter” _builder_version=”4.27.5″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” theme_builder_area=”post_content” custom_margin=”||2em||false|false” sticky_enabled=”0″]<\/p>\n Ancistrus catfish are typical cave breeders. A male looks for a suitable cave, cleans it thoroughly and lures a female into it to lay eggs. After fertilization, the male takes over the brood care, guards the clutch and fans the eggs with fresh water. The larvae initially remain in the cave and feed on the yolk sac before exploring the aquarium as young fish. <\/p>\n Under good conditions and with several caves available, a single pair of Ancistrus<\/em> can spawn regularly \u2013 in community tanks, this can quickly lead to a “surplus of catfish.” If you want to breed them specifically, you will find a lot of practical advice in the care guide “Keeping, Caring & Breeding”<\/a> and in the blog articles on the subject of “Breeding”<\/a>, or directly in our breeding instructions: Breeding Bristlenose Catfish (Ancistrus) \u2013 Step-by-Step<\/a>.<\/span> <\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”1_2″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/12\/Brutpflegendes-Maennchen-der-albinotischen-Zuchtform-des-gemeinen-Antennenwelses-Ingo-Seidel-800×400.jpg” alt=”Brood-caring male of the albinotic breeding form of the common” title_text=”Brood-caring male of the albinotic breeding form of the common” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Brood-caring male of the albinotic breeding form of the common Ancistrus catfish, photo: Ingo Seidel<\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/12\/Ancistrus-sp.-Aquarienstamm-Jungfische-Ingo-Seidel-800×400.jpg” alt=”Ancistrus sp. "Aquarium strain", juveniles ” title_text=”Ancistrus sp. "Aquarium strain", juveniles ” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Ancistrus sp. “Aquarium strain,” juvenile fish, photo: Ingo Seidel <\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”3_5,2_5″ admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”3_5″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text admin_label=”Warum Ancistrus mehr sind als nur Algenfresser” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Ancistrus catfish are often purchased as “practical” aquarium inhabitants because they eat algae and growth. Anyone who deals with them more intensively quickly notices: The robust, peaceful catfish are exciting observation objects with pronounced behavior, individual characters and an amazing variety of species. <\/p>\n This is exactly the approach of Ancistrus.at<\/a>: The website offers profiles of many Ancistrus<\/em> species<\/a>, background articles on keeping and feeding, and an Ancistrus<\/em> blog<\/a> with news and practical reports. If you want to delve even deeper, you will find the comprehensive standard work with over 600 pages, numerous species portraits, and many photos from nature in the book “Ancistrus: The Armored Catfish of the Genus Ancistrus<\/em>“<\/a>, which is available, among other places, in the ATS-Aquashop<\/a>.<\/p>\n <\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”2_5″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/www.ancistrus.at\/wp-content\/uploads\/2025\/04\/Cover_AncistrusBuch-scaled.jpg” title_text=”Ancistrus Book Cover” url=”https:\/\/www.ats-aquashop.de\/Bristlenose-Catfishes-The-Plecos-of-the-Genus-Ancistrus” url_new_window=”on” _builder_version=”4.27.4″ _module_preset=”default” transform_rotate=”0deg|0deg|2deg” box_shadow_style=”preset2″ box_shadow_horizontal=”18px” box_shadow_vertical=”13px” box_shadow_spread=”12px” box_shadow_color=”rgba(0,0,0,0.5)” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”row” _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” width=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text admin_label=”H\u00e4ufige Fragen zu Antennenwelsen” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n [\/et_pb_text][et_pb_accordion icon_color=”#67A23F” use_icon_font_size=”on” icon_font_size=”22px” _builder_version=”4.27.4″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” rank_math_faq_schema=”on” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_accordion_item title=”How big do Ancistrus catfish get in the aquarium?” open=”on” open_toggle_text_color=”#FAEDCB” _builder_version=”4.27.4″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” border_color_all=”RGBA(255,255,255,0)” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n Most Ancistrus catfish of the genus Ancistrus<\/em>, which are offered in the trade as robust, peaceful catfish, reach about 8\u201312 cm standard length in the aquarium. Some species remain somewhat smaller, others can become somewhat larger. In the species list on Ancistrus.at<\/a>, the expected sizes are given for many Ancistrus<\/em> species. <\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”Are Ancistrus catfish really good %22window cleaners%22?” open_toggle_text_color=”#FAEDCB” _builder_version=”4.27.4″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” border_color_all=”RGBA(255,255,255,0)” global_colors_info=”{}” theme_builder_area=”post_content” open=”off”]<\/p>\n Ancistrus catfish are known as Scheibenknutscher<\/strong> and Scheibenlutscher<\/strong> because they scrape algae and growth from windows and decorations with their sucker mouth. They help with algae control, but cannot compensate for fundamental care errors. Ancistrus<\/em> should not only be regarded as “window cleaners”, but as fully-fledged aquarium inhabitants with their own demands on food, setup and water quality. <\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”Are Ancistrus catfish suitable for beginners?” open_toggle_text_color=”#FAEDCB” _builder_version=”4.27.4″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” border_color_all=”RGBA(255,255,255,0)” global_colors_info=”{}” theme_builder_area=”post_content” open=”off”]<\/p>\n Yes, many Ancistrus<\/em> species are considered robust and peaceful and are therefore well suited for beginners \u2013 provided that the aquarium is sufficiently large, well filtered and offers hiding places and roots. Anyone who deals with keeping and nutritional requirements in advance has very grateful fosterlings with Ancistrus catfish. A good basis is provided by the profiles on Ancistrus.at<\/a> and the book “Ancistrus Catfish: The Armored Catfish of the Genus Ancistrus”<\/a>. <\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”Do Ancistrus catfish attack aquarium plants?” open_toggle_text_color=”#FAEDCB” _builder_version=”4.27.4″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” border_color_all=”RGBA(255,255,255,0)” global_colors_info=”{}” theme_builder_area=”post_content” open=”off”]<\/p>\n In principle, Ancistrus catfish are considered plant-compatible. However, if they find too little plant food or growth, some animals may start to rasp on delicate plant leaves. This behavior occurs mainly in very clean tanks with little growth and a lack of additional feeding. More on this in the article “Ancistrus<\/em> and plants \u2013 why some catfish go to plants”<\/a>. <\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”How many Ancistrus catfish can I keep in my aquarium?” open_toggle_text_color=”#FAEDCB” _builder_version=”4.27.4″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” border_color_all=”RGBA(255,255,255,0)” global_colors_info=”{}” theme_builder_area=”post_content” open=”off”]<\/p>\n For a typical community tank from 80 cm edge length, a pair or a small group of Ancistrus catfish is useful, provided that sufficient hiding places and caves are available. In tanks that are too small, territorial disputes can occur, especially between adult males. If you want to keep several Ancistrus<\/em> species or variants specifically, you should choose correspondingly larger tanks and inform yourself about the final size and behavior in the species profiles<\/a>. <\/p>\n [\/et_pb_accordion_item][\/et_pb_accordion][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":" Ancistrus catfish, mostly known in aquaristics by their genus name Ancistrus, are among the most popular armored catfish in freshwater aquariums. Many aquarists know them as diligent “window cleaners” or affectionately call them Scheibenknutscher, Scheibenlutscher or simply Knutschi. Behind these robust, peaceful catfish, however, there is much more than just a practical algae eater: Ancistrus […]<\/p>\n","protected":false},"author":1,"featured_media":2202,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-3074","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.ancistrus.at\/en\/wp-json\/wp\/v2\/pages\/3074","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ancistrus.at\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ancistrus.at\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ancistrus.at\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ancistrus.at\/en\/wp-json\/wp\/v2\/comments?post=3074"}],"version-history":[{"count":11,"href":"https:\/\/www.ancistrus.at\/en\/wp-json\/wp\/v2\/pages\/3074\/revisions"}],"predecessor-version":[{"id":3373,"href":"https:\/\/www.ancistrus.at\/en\/wp-json\/wp\/v2\/pages\/3074\/revisions\/3373"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ancistrus.at\/en\/wp-json\/wp\/v2\/media\/2202"}],"wp:attachment":[{"href":"https:\/\/www.ancistrus.at\/en\/wp-json\/wp\/v2\/media?parent=3074"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
The following is also important for the right breeding group: Identifying the Sex<\/a>.<\/p>\nAncistrus<\/em> \u2013 a species-rich genus of armored catfish<\/h2>\n
Typical characteristics of Ancistrus catfish<\/h2>\n
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Habitat and origin<\/h2>\n
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Ancistrus catfish in the aquarium: Keeping & setup<\/h2>\n
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Nutrition: More than just “window cleaners”<\/h2>\n
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Reproduction: productive cave breeders<\/h2>\n
Why Ancistrus<\/em> are more than just algae eaters<\/h2>\n
Frequently asked questions about Ancistrus catfish<\/h2>\n