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Order Cetacea

si tA' she uh, whales

CONTENTS

Some Facts About Whales

Suborder Mysticeti -- Baleen Whales
Suborder Mysticeti
baleen whales

Blue Whale (Balaenoptera musculus)
The Blue Whale (Balaenoptera musculus)
is the largest animal to have ever lived, dwarfing even the largest dinosaurs. Adults average 80 to 105 feet in length and weigh up to 200 tons. The tongue is as heavy as an elephant, and the heart the size of an automobile.

Gray Whale (Eschricktius robustus)
Gray Whale (Eschricktius robustus)

Humpback Whale (Megaptera novaeangliae)
The
Humpback Whale (Megaptera novaeangliae)
is one of the largest baleen whales, with adults being 40-50 feet long and weighing 25-40 tons. It is distinguished from other whales by an obvious hump behind the head, black dorsal coloring, wavy rear edges on the tail flukes, and the presence of rounded, bump-like knobs on the top of the head.

Suborder Odontoceti -- Toothed Whales
Suborder Odontoceti
toothed whales

Beluga Whale (Delphinapterus leucas)
Beluga Whale (Delphinapterus leucas)

Narwhal (Monodon monoceros)
Narwhal (Monodon monoceros)
The most characteristic feature of the narwhal is its tusk, which is always spiral in a counter-clockwise (as viewed by the animal) direction and can be as long as 9 feet. Only present in males, the tusk is actually a greatly elongated tooth.

Bottle-Nosed Dolphin (Tursiops truncatus)
Bottle-Nosed Dolphin (Tursiops truncatus)
The most distinguishing feature of the bottle-nosed dolphin is its short, thick beak with 20-28 sharp conical teeth on each side of the jaw, giving it a "smiling face." Among the most intelligent and playful animals in the sea, they are star attractions at marine parks around the world and one even starred in a television series.

The Robinson Library >> Science >> Zoology >> Mammals