Pleco Help!!

Does anyone know what this is? It's been there a couple days. He's eating fine seems to be nornal and isn't stressed out.

Can you post a picture of it from the side view?
Try to make sure it's in focus

It's possibly excess mucous or some sort of parasite, my guess is mucous. You can try wiping it off with a tissue and see what happens.

The fish might have damaged itself and it is simply covering a sore/ wound.