Bear paw clam shell. Illustrations of the shell of the bear paw clam (Hippopus hippopus), also known as the horse's hoof clam or strawberry clam. This species of large tropical saltwater clam (family Tridacnidae, the giant clams) is found in the southern and western Pacific Ocean. Shells of bivalve molluscs such as clams consist of two articulating parts, or valves.