Sea Otters Crack Open Shells With Rocks
Sea otters are unique among marine mammals for their ability to use stone tools. The aquatic critters are often seen using jagged rocks to crack open the shells of the prey. Clams, crabs, abalone, and mussel shells are no match for a rock-wielding otter. Sea otters catch their food in the water before swimming to the surface to enjoy their meal. Once above water, they float on their backs, balancing the shelled animal on their chest, and use their stone anvil to smack the shell until it cracks. The otters even have a special pouch that they use to carry their favorite smashing rock. In the folds under their arms, sea otters have pockets of loose skin for storage.