MAMMALS of the OCEAN:

1. MAMMALS of the OCEAN: Whales, Dolphins, Seals, Sea Lions, Walrus, Manatee, Sea Otter and Polar Bear

2. Whales and Dolphins Orca (Killer whale) Bottlenose dolphin

3. Whales and Dolphins come from the same family, CETACEA (sey-tay-sha)

4. What do they have in common? • They both breath from a blowhole located at the top of their head. Minke whale

5. Whales and dolpins are mammals. They are mammals because they have lungs not gills, they have hair not scales , and they also give live birth and don't lay eggs. There are only about 80 kinds of whales and dolphins that we know of right now.

6. There are two major groups of whales—the toothed whales (suborder Odontoceti) and the toothless baleen whales (suborder Mysticeti). orca

7. Toothed Whales • Toothed whales include several families. a) the beaked and bottlenose whales (family Ziphiidae) and the sperm whale, or cachalot (family Physeteridae);

8. Bottlenose whale

9. beluga

10. Beaked whale

11. Sperm Whales have the largest "nose" in the animal kingdom. The nose contains an oil filled case which scientists believe the animal uses to produce and focus sound

12. b) the beluga, or white whale, and the narwhal (family Monodontidae), narwhal

15. beluga

16. c) small polar whales with no dorsal fin and only a few teeth; the river dolphins (family Platanispidae), which inhabit muddy rivers of India and South America;

17. River dolphin

18. d) and several families better known as ocean dolphins and porpoises. The killer whale and pilot whale are types of dolphins. point of interest: The white whale Moby-Dick, of Herman Melville's novel, was not a beluga but an albino sperm whale

21. Pilot whales Killer whale

22. They catch fast-moving prey, like fish or squid. Many species use echolocation (sonar) for underwater navigation and hunting. They have a single blowhole and a wide throat to accommodate large prey. Some of the larger ones, like the sperm whale, can dive as deep as 1.5 km

23. Toothless Whales There are three families of baleen whales • The right whale family (Balaenidae), including the bowhead, or Greenland whale;

26. 2) the gray whale family (Eschrichtidae), with a single species (Eschrichtius robustus) found in the North Pacific Ocean;

29. 3) the rorqual family (Balaenopteridae) This group includes the humpback whale, the sei whale, the minke whale, the Bryde's whale, the fin whale (or common rorqual), and the blue whale, which can grow to a length of 100 ft (30 m) and a weight of 150 tons.

30. humpback

31. Dwark minke whale

32. humpback

33. Sei whale

34. Fin whale

35. Bowhead whale

36. Baleen whales are large species, usually over 33 ft (10 m) long. They are filter feeders, living on shrimplike krill, plankton, and small fish. They lack teeth but have brushlike sheets of a horny material called baleen, or whalebone, edging the roof of the mouth

37. Blue Whales are the largest to have ever lived on the planet at a recorded length of more than 110 feet and a weight of around 190 tons

38. http://asa.aip.org/sound.html • http://www.everythingdolphins.com/SoundsPG.htm

40. http://whale.wheelock.edu/whalenet-stuff/humpcat.html

41. Other Marine Mammals Pinnipeds • aquatic mammals that use flippers for movement on land and in the water • Examples: Seals, sea lions, and walruses (33 species) • these species are carnivores

42. SEALS: • Seals do not have an ear that extends from the skull, but they can still hear well.  • Seals propel themselves through the water with their rear flippers. • Their front flippers are used for steering.  • The front flippers of seals are short with sharp claws.  Seals cannot use their rear flippers to walk on land or ice and most appear awkward when moving on these surfaces.  • Seals have a torpedo like shape in the water and use their rear flippers to move rapidly to catch prey and escape predators. 

43. Largha (spotted) seal

44. Crabeater seals

45. Crabeater seal skull with blowup of the special teeth that are used to filter the krill from the water

46. Ribbon seal

47. Harbor seal

48. Spotted seal

49. Sea Lions and Fur Seals • Sea lions have a rounded snout and their fur is courser and shorter than a fur seal.  Sea lions are the larger of the two.  Fur seals have a longer, pointer snout, their fur is longer and finer, and their flippers are longer.  • Fur seals and sea lions have ears that extend from the skull.  The front flippers of fur seals and sea lions are used to propel them through the water.

50. Steller sea lion