Gremlin dove deep into the water and quickly found what he was looking for: a sea mine on the ocean floor. He attached a clamp to the mine so that workers could safely pull it out of the water. Gremlin is a sea lion that was trained by the U.S. Navy to protect American sailors and ships from danger. Because sea lions are smart and able to swim fast, dive deep, and fit through narrow spaces, they can locate mines and capture enemies underwater more...