Bala Shark Regular Balantiocheilus melanopterus.. The Bala Shark is a beautiful fish that is a shark in name only; it’s really a member of the carp and minnow family. It has: large eyes; silver body with black trim; and an upright dorsal fin. Its silver body shines and reflects light in a striking manner. They feed off of mainly crustaceons, insects and their larvae. These fish are very popular aquarium fish. They tend to swim fast, and in numbers, so make sure to leave plenty of room in the tank.