First Children's Encyclopedia by Dorling Kindersley - page 135

Water mammals
Seals bark like dogs!
Otters of the sea
The sea otter is the smallest sea mammal.
It has luxurious, thick fur that keeps it very
warm. It rarely comes to land, and even sleeps
in the water. When it nods off, it wraps itself
up in kelp plants to stop it from drifting away!
Sea cows
Manatees are often called
sea cows because they are
so big and they “graze”,
like cows, on river-bed
plants. They spend all their
lives underwater, and
even give birth there.
Otters
Otters are small mammals that have
webbed feet to help them swim. The
river otter lives along river banks and
spends its day swimming to catch food.
Walruses use their noses,
like pigs, to root around
the sea floor for food,
such as crabs or
sea urchins.
Walrus
Walruses
Walruses are
huge sea mammals that have
massive, blubbery bodies and very
wrinkly skin. They heave themselves
out of the water to rest and breed.
In the pink
Walruses are normally greyish-brown
in colour. But when they sunbathe, they
blush pink because their blood rushes
to the surface of their skin to cool them.
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