Vertebrates
Vertebrates are different from other animals because they have a back bone. Mammals, reptiles, birds, fish, and amphibians. A mom seal can tell it's baby apart from hundreds of others. Some bears are nocturnal. The whales shark is the largest fish. It can get 400 feet long.
Image from http://www.abovetopsecret.com/forum/thread982527/pg1
Image from http://www.abovetopsecret.com/forum/thread982527/pg1