Yes so do any cichlids!! My best way to get rid of them. Finally got rid of 6 3” guys for free . Put these big guys in a20g so I could catch them easier. Bought some tetras and decided to qt them with the plecos. I feed the plecos twice daily but I started losing a tetra a day. I think these plecos were eating them! Only other thing in tank is shrimp. But up new pictures,said for free and got rid of the 6. Hopefully 2 more over the weekend. No more 2 plecos in a tank!!! These guys are worse than ants!!!