The orca's color is for camouflage. The male orca's six foot dorsal fin is amazing because it's almost as tall as Michael Jordan. The dorsal fin stands up straight and tall when the whale lives in the ocean. In captivity, the dorsal fin flips over and bends down. The orca is the fastest of the water mammals.
Orcas usually have fifty teeth.
The orca's teeth are about three inches long. In fact, the average orca eats 551 pounds of food every day. Once, some orcas attacked some dolphins. The circled around the dolphins, causing them to bunch together. Then, all the orcas took turns swimming into the circle and feeding on the dolphins.