This document discusses animals and plants in the ocean biome, including sharks, jellyfish, lanternfish, tuna, coral, and seaweed. It describes adaptations of seahorses, whales, and sharks that help them survive, such as a seahorse's camouflage, a whale's blubber, and a shark's sharp teeth. The ocean environment is described as extreme due to its diverse wildlife like sharks and whales. The document concludes with a brief mention of the ocean food web.