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.
Hunting in packs helps wolves kill large animals such as moose or elk. They are good swimmers and when necessary pursue their prey into water. A big appetite. The timber wolf can eat a lot of meat at one meal and then go without food for a considerable time.