Marine Mammals

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Marine Mammals

• Classifications

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• Whales Dolphins and Porpoises- Order Cetacea
• Cetaceans are further broken down into
• Suborder Mysticeti (Beard Bearing)-Baleen Whales
• Suborder Odonticeti (Tooth Bearing)-Sperm whales
  and Dolphins

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Cetaceans Continued

• Baleen Whale such as, Gray, Blue, Fin, minke and
  Humpbacks are Rorqual Whales. They have pleats
  under the mouth that aid in feeding (Baleen).
• Mysticeti 2 blow holes
• Odonticeti 1 blow hole
• The Killer Whale is the largest member of the
  Dolphin Family.

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Cetaceans Anatomy baleen
Mellon

• Sperm Whale has a large spermaceti organ that is
  also called the Mellon
• Baleen whales such as the Humpback only have
  baleen on the top jaw.

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Rorqual pleats of a Fin whale
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Polar Bears, Sea Otters, Manatees (Order
Carnivora)

• Polar Bears- Family Ursus (Bear Family).
• Scientific Name is Ursus Maritimus (Sea Bear)
• Sea Otter- Family Mustilidae (Weasel Family)
• Manatee- Order Sirenia (Named for the Sirens of
  Greek Mythology because sailors believed them to
  be Mermaids)

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Order Pinnipedia (Feather-Foot)

• Seals, Sea Lions and Walruses
• Differences between Seals and Sea Lions

Seal Sea Lion
Ears No External Ears External Ears
Propelling fins Posterior Anterior
Neck Short Long
Land Movement Caterpillar Rotate Hips and Walk
Nails on Flippers Yes No
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Pinnipeds Continued

• The Walrus is the largest Pinnipedia Species
• Southern California has two species of Pinnipeds
  California Sea Lion, Harbor Seal
• The Leopard Seal is the Polar Bear of the
  Antarctic

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