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__________________ Mammals
Marine Mammals Mammals found in the
________________
Specially equipped for water environment• ________________________ instead of feet• Store _________________ of fat on their
body• Have ______________ that obtain oxygen
and eliminate waste ___________________
Walrus
Walrus Both ________________ have the tusks
• Up to 3’ long that are used to ________for food
Grouped with ______________________
_______________ measure to ________’ long and weigh ____________ lbs.
Walrus
__________ have young every ____ years• Young live on mother’s ____________ for 2
years
Enemies __________________, killer whales, and ___________________ bears
Manatee
Manatee Ranges from _________ coastal waters of
__________________ to South America
Whale-like body is equipped with paddle-shaped ____________, a large ______ tail, and an upper lip covered with ___________
Can get as large as ____________ lbs. and as long as _________’
Manatee
Now classed as an ___________ species and protected by law• Only one species now exists in North America
Cannot survive ________________________ below 46 degrees
Greatest threat comes from motorboat ______________ that injure them before they dive to safety
Blue Whale
Blue Whale
Blue Whale _______________ mammal to live on earth
• Reaches 100 feet ___________ and weighs as much as 150 ____________
Spend summers ______________ in arctic and goes ________________ in winter
Only enemy is the ______________ whale, other than humans
Blue Whale Calf weighs 2 tons at birth
Whale milk is high in _________ and _________________ compared to the milk of land mammals
• Calf consumes up to _________ lbs. of milk every day until it is weaned at about 7 mos. Old
• Calf will weigh around ___________ tons and measure 52’ long
Sperm Whale
Sperm Whale Largest of the __________________ whales
50’ in length and has a large head and mouth
Feeds on _____________ and ____________
Found in deep water
Consume as much as a ____________ of food every day
Sperm Whale Live together in ___________ or herds
of females and calves
Bulls win ____________ positions by defeating their challengers and enter ____________ during breeding season
Cows are very ____________________ of their calves, and remain with them even when they die
Killer Whale
Killer Whale _______________ and white in color
Largest of the ____________________
Grow as large as 31’ and weigh _____ tons
One of most feared predators in the ocean
Hunt together with others and prey upon other large marine mammals (__________, penguins, walrus, and other whales)• Coordinated effort on ___________________
Common Dolphin
Common Dolphin
Mature at length of 8’ and weigh up to ___________ lbs.
Long, thin _______________ distinguish themselves from porpoises
Catching _______________ makes up their diets
Common __________________
Often live together in large herds
Are considered to be ________________ animals
Often seen ____________ with boats and ships at sea
Harbor Porpoise
Harbor Porpoise
Medium-sized _______________ fin, black body, and light-colored belly
____________-shaped mouth differs, compared to dolphins
Eats several ___________ of fish and is preyed upon by killer whales and sharks
Marine Mammals
Marine Mammals Mammals found in the oceans
Specially equipped for water environment• Flippers instead of feet• Store layers of fat on their body• Have lungs that they obtain oxygen and
eliminate waste gases
Walrus
Walrus Both sexes have the tusks
• Up to 3’ long that are used to dig for food
Grouped with seals
Bulls measure to 13’ long and weigh 3,700 lbs.
Walrus
Cows have young every 2 years• Young live on mother’s milk for 2
years
Enemies include humans, killer whales, and polar bears
Manatee
Manatee Ranges from warm coastal waters of
Florida to South America
Whale-like body is equipped with paddle-shaped forelimbs, a large flat tail, and an upper lip covered with bristles
Can get as large as 1,200 lbs. and as long as 15’
Manatee
Now classed as an endangered species and protected by law• Only one species now exists in North America
Cannot survive temperatures below 46 degrees
Greatest threat comes from motorboat props that injure them before they dive to safety
Blue Whale
Blue Whale
Blue Whale Largest mammal to live on earth
• Reaches 100 feet long and weighs as much as 150 tons
Spend summers feeding in arctic and goes south in winter
Only enemy is the killer whale, other than humans
Blue Whale Calf weighs 2 tons at birth
Whale milk is high in fat and protein compared to the milk of land mammals
• Calf consumes up to 200 lbs. of milk every day until it is weaned at about 7 mos. Old
• Calf will weigh around 23 tons and measure 52’ long
Sperm Whale
Sperm Whale Largest of the toothed whales
50’ in length and has a large head and mouth
Feeds on squid and octopus
Found in deep water
Consume as much as a ton of food every day
Sperm Whale Live together in pods or herds of
females and calves
Bulls win dominant positions by defeating their challengers and enter herds during breeding season
Cows are very protective of their calves, and remain with them even when they die
Killer Whale
Killer Whale Black and white in color
Largest of the dolphins
Grow as large as 31’ and weigh 8 tons
One of most feared predators in the ocean
Hunt together with others and prey upon other large marine mammals (seals, penguins, walrus, and other whales)• Coordinated effort on prey
Common Dolphin
Common Dolphin
Mature at length of 8’ and weigh up to 180 lbs.
Long, thin jaws distinguish themselves from porpoises
Catching fish makes up their diets
Common Dolphin
Often live together in large herds
Are considered to be intelligent animals
Often seen swimming with boats and ships at sea
Harbor Porpoise
Harbor Porpoise
Medium-sized dorsal fin, black body, and light-colored belly
Flat-shaped mouth differs, compared to dolphins
Eats several types of fish and is preyed upon by killer whales and sharks
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