Looks like a mala. They are common in Trinidad. They require a 2 foot wide tank at least and 5 feet long should be good. That's the best size to keep ur mala happy. Not too picky with food. Looks like u got some current in the tank. This wolf don't like it too much current. If there's a dead spot it will hangout there. Will sit like a log at the bottom of the tank till feeding time.