I was recently at the adventure aquarium recently and in their touch tank they had what they called brown carpet sharks. I looked it up online and about 3-5 different species came up. They were roughly 1 foot long and looked like little brown nurse sharks kind of. Some were brown, some were a tannish gray. What could they be??? They also had epaulette sharks in a tiny tank that were not full grown but they looked fine. What size tank would they need??? Has anyone seen what I mean??????? For the rank size I meant for both sharks. Thanks.