Seals, Sea Lions, and Walrus

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Presentation transcript:

Seals, Sea Lions, and Walrus Members of the order Pinnipedia are nearly exclusively marine Pinnipeds include: Seals Sea lions and fur seals Walruses

Seals, Sea Lions, and Walrus Pinnipeds (“fin-footed”) evolved from a terrestrial carnivore They are predators, feeding mainly on fish and squid Streamlined bodies for swimming Thick layer of fat, or blubber for insulation, food reserves, and buoyancy

Sea lions and fur seals vs. Seals Sea lions and fur seals (Otariidae) Seals (Phocidae)

Photograph is property of the Riverhead Foundation Seals Seals (earless pinnipeds; family Phocidae) have 19 representative species Rear flippers cannot be moved forward No external ear flap Claws (and fur) on flippers Short, robust neck Photograph is property of the Riverhead Foundation

Sea lions and fur seals Sea lions and fur seals (eared pinnipeds; family Otariidae) have 15 representative species Rotatable hind flippers External ear flap Long, flexible neck No fur or claws on flippers

Seals Found in Long Island waters Hooded Seal Harbor Seal Harp Seal All photographs are property of the Riverhead Foundation Gray Seal Ringed Seal

Sea Lions found in Long Island waters X http://www.atlantismarineworld.com/exhibit-outdoor-sealion.html There are NO sea lions in the Atlantic Ocean, and therefore no sea lions on Long Island (except at local aquariums)

Walrus Walrus (family Odobenidae) are large pinnipeds with a distinctive pair of tusks Both male and female have tusks; can reach 1 meter in length! Used for defense, and anchoring onto ice Strictly Arctic! Benthic-feeder; feeds primarily on clams “tooth walk” for observing walrus pulling themselves out of water with tusks