They are plecos ummmm...the first one looks like a chocolate pleco...the other two look like common plecos which get huge...the pics are kinda blurry so it's hard to tell...are there any special markings or anything on any of them?? there are some smaller plecos if you want...like bushynose, clown, or zebra, they stay about 4 inches...or so...what else do you have in your tank?
They are also very messy. We're talking poop machines.: