It looks like a hog choker, they are native to the coastal and inland waters of the USA, they need some salt in the water or at least some calcium chloride. Add about a table spoon per gallon of marine aquarium salt, they feed best on small live food, they are really soles and not flounder so they do not have the huge mouth of a flounder. I've raised them to 10" in slightly salted water, live daphnia, tiny earth worms, or trout worms work well, calcium chloride is good for them if you have fish that are sensitive to sodium chloride. Other fish tend to out feed them and can cause them to starve slowly, they like very fine sand and mine always liked to perch on large smooth rounded stones as well. They will stick to the glass as well, all in all they are very cool fish....
