A killer whale has a blowhole is a hole that whale have to help them breath. A killer whale has a tail to help for speed and to turn. They eat sea lions,seals,and fish. This is how you tell the difference between the female and male , the female fin is 3 feet tall, the male fin is 6 feet tall. The great white shark is a huge fish.A great white shark doesn't breathe air it gets air from the water. This is how you tell the difference between a female and a male well you can't tell the difference. They eat fish, sea turtles, seals, sea lions, and few people.