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 Northern Rocky Mountains wolf preys primarily on the American bison, Rocky Mountain elk, the Rocky Mountain mule deer, and the North American beaver, though it is an opportunistic animal and will prey upon other species if the chance arises.