Tropical fish are a diverse group of aquatic animals that inhabit warm waters around the world. Guppies, with five letters, are small, brightly colored freshwater fish native to South America. Tetra, also with five letters, is a genus of small freshwater fish from Africa and South America. OPAH, with four letters, is a large, deep-bodied fish found in tropical and subtropical oceans. SCAD, with four letters, is a type of jack fish found in tropical and subtropical waters. MANTA, with five letters, is a large species of ray found in warm ocean waters. Mullet, with six letters, is a family of ray-finned fish found in temperate and tropical waters. Sparid, with six letters, is a family of perciform fish found in shallow temperate and tropical waters. Tetras, with six letters, is a group of small, freshwater fish found in South America. Piranha, with seven letters, is a group of carnivorous fish found in South American rivers.