Elasmobranchii is a subclass that includes the sharks and the rays and skates. Members of the elasmobranchii have no swim bladders, five to seven pairs of gill clefts opening individually to the exterior, rigid dorsal fins, and small placoid scales.
Wolf Prey Animals and food diet. Wolves predominately prey on hoofed animals including Deer, moose, Bison, Elk, and caribou. Because wolves usually hunt for large animals, (although wolves are opportunistic and will eat smaller prey) they work together to catch their prey. Wolves will eat a healthy, strong animal if they can catch it.
The gray wolf generally specializes in predating on the vulnerable individuals of large prey, with pack of timber wolves capable of bringing down a 500 kg (1,100 lb) moose. Digestion only takes a few hours, thus wolves can feed several times in one day, making quick use of large quantities of meat.