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Plecostomus, pleco, or plec is the common name of several species of freshwater loricariid catfish commonly sold as aquarium fish.

These include:

  • Hypostomus plecostomus
  • Hypostomus punctatus
  • Pterygoplichthys multiradiatus
  • Pterygoplichthys pardalis

It is also used as part of the common names of various similar species of loricariids.