Water Mammals

1. Sea Lion
2. Walrus
3. Sperm Whale
4. Beluga Whale
5. Blue Whale
6. Manatee
7. Narwhal
8. Platypus
9. Dolphin
10. Dugong
11. Elephant Seal
12. Northern Fur Seal
13. Gray Seal
14. Leopard Seal
15. Sea Otter

Source: http://www.angelfire.com/il/watermammals/