Loricariid ID

Looks like regular Hypostomus plecostomus to me.

...except that H. plecostomus is actually a very rare species in the aquarium trade, and most 'common plecos' are actually Pterygoplichthys.

@DaLilFishie The coloration seems too dark. I could be wrong, though.

Back when I started keeping fish about forty years ago the "Common Plecostomus" were actually Hypostomus. When Pterygoplichthys gibbiceps came in they were called Red-spot Plecs. Now it appears to have shifted to Pterygoplichthys being called "Common Plecostomus" instead. The one in this photo clearly isn't a P. gibbiceps but you'd really need a good view of the dorsal fin to tell which genus it is.

@Swampy oh!! I didn't know lol, I thought "common plecos" were H. plecostomus!

@Chlidonias oh yeah definitely not P. gibbiceps- much more likely to be P. pardalis, P. disjunctivus or P. multiradiatus. Invasive populations derived from aquarium trade dumps/releases have been shown to largely be those species, and hybrids thereof.

I'll dig the papers out later when I get time to look.