Not necessarily common in the aquarium world but super common in our native reefs around Pensacola! I love diving out around our jetties and piers and seeing these little guys hanging out in oyster shells!
Flagler over here. In my line of work, they love the spaces around sailboat rudders. They'll hitch a ride on you too, sometimes all the way to the truck!
I used to have one.. my LFS got a batch of about 12 in and everyone thought they were saltwater plecos [emoji23]
I guess my friends are not the only ones. It is a great dewormer though. I didnt realise it would eat all the bristle worms.. and most of the small brittle stars.. and any shrimp thats not a giant skunk cleaner..