Plecostomus, pleco, or plec refers to several species of freshwater loricariid catfish commonly sold as aquarium fish:
Hypostomus plecostomus Hypostomus punctatus Pterygoplichthys multiradiatus Pterygoplichthys pardalis Ancistrus cirrhosus
Pleco may also refer to: Pleco Software, an English–Sinitic dictionary application for iOS and Android devices, which uses the traditional Chinese character for "fish" (魚 yú) in its icon.
See also Plecostomus (disambiguation)