The Toadfish, Opsanus beta, hails from the waters of the Gulf of Mexico and is almost always a orange/brown hue.  It is a bottom dwelling predator that seeks out small fish and inverts. It  is best kept in a large aquarium void of these small organisms. With such a large mouth and a large appetite, the Toadfish can make many small organisms prey. They are hardy and can handle large fluctuations in tank specs.