That sure looks a lot like mine. The two I have in the outside pond, one of them is a lot bigger than the other. Do you know how to tell males from females? I imagine the Mollies and Guppies would eat any eggs they laid but it would be awfully cute to have baby plecos. The smaller of the 2 outside is more friendly, he will come up and let you feed him by hand. The Mollies will clean the dead skin off your feet and the smaller pleco gets into that as well. He's got quite a suction on that mouth. We put a rock near the pond so you can sit and have a fish pedicure
There are salons here in the city that offer "special" fish in tanks for a pedicure, they charge a lot more. I don't know what kind of fish they have at the salons but the Mollies are quite good at it and the pleco, he almost takes the skin off. When he first started doing that, I was in the pond cutting the dead lily leaves and suddenly something attached to my skin above my knee. I almost walked on water out of the pond. I finally caught the littler pleco in the act, he sneaks up on you and starts sucking your skin. I have to bat him away when I'm in the pond. My feet are ok but not anything else