Remoras (family Echeneidae) are ray-finned fish that are known to attach themselves to large marine animals, such as whales, sharks, and turtles. They get a free ride and sometimes food, and in return ...

Denis Richard watched five men heave a giant manta ray from the waters off Panama City Beach and plop it into a pool on their boat deck. "Let him go," he yelled. "You ought to be ashamed of yourselves ...