They are warm-blooded mammals that deliver live young. Check out this link to find all kinds of interesting facts about whales. Dolphins are very smart mammals that can learn and imitate behaviors. Sharks are considered fish with many sharp teeth. Sharks swim very fast and breath using gills.
Manatees are nonaggressive, gentle mammals.
It is very important to protect the ocean's manatees. The West Indian manatee is even listed as an endangered species. Sea Lions are known for being smart, playful, and noisy. Sea Lions live in the sea and eat such things as squid, octopus, rockfish, and mackerel. Jellyfish are animals that look like jelly.