Although small compared to some whales, killer whales are the largest predators of mammals ever known.
Individual sizes vary significantly between geographical areas.
B. Body shape. A killer whale has a sleek, streamlined, fusiform body. Its physical characteristics are adapted for life in an aquatic environment. These animals are easily recognized due to their striking black and white coloration. The dorsal surface and pectoral flippers are black, except for the area below and behind the dorsal fin.