On a couple of occasions I've been at the Aquarium Of The America's in New Orleans when they were feeding the fish in their biggest tank, which is a Gulf of Mexico tank and it was cool. The Gulf of Mexico tank has a lot of sharks, jacks, grouper, sawfish and a school of good sized redfish. When they start feeding they have to drop a bunch of pellet food on one end of the tank to draw the redfish over, than they start feeding chunks of fish to the sharks and stuff. The redfish are such agressive feeders that they will take food from much larger preditors like tiger sharks. I watched redfish literally take food right out of the mouth of sharks.