Being a bottom-dweller, the Sucking Catfish's most prominent feature is a big suckermouth, which it uses for scraping algae and clinging to objects. They have a special opening on the upper part of the gill cover for the water intake so the fish can breathe without using its mouth. Sucking Catfish are not fussy about water chemistry providing the water is kept clean and they predominantly eat algae and plant food but readily accept all kinds of foods.
