Sharks are marine mammals that belong to the phylum Chordata, which is characterized by animals that have a backbone, a spinal column, and a notochord. Sharks are then further organized into the class Chondrichthyes, which includes all fish with skeletons made of cartilage, and then into the subclass Elasmobranchii, which includes sharks, rays, and skates….
Mako's Musings
