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.
Gray wolves are known as keystone predators because they help maintain a balanced ecosystem. Their diet consists of ungulates (large hoofed mammals) such as elk, deer, moose, and caribou, as well as smaller mammals like beavers and rabbits.lthough they are called gray wolves, these ancestors of domestic dogs actually range in color from brownish-gray, to all black, to all white. Gray wolves are the largest of all canines. At 60-90 cm (2-3 ft.) at the shoulder and 1.5 m (4.5-6.5 ft.) in length, gray wolves vary in weight from 25-60 kg (55-130 lb.).