Female orcas can live to be more than 90 years old. Front flipper Whales and dolphins evolved fr / anon

anon

Female orcas can live to be more than 90 years old.
Front flipper
Whales and dolphins evolved from land mammals, and their fore flippers are modified arms with extended fingers. The rigid structure moves mainly at the shoulder joint.
Cartilage
'finger'
242 mammals ° cetaceans
Eye patch
The

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Orcinus orea
Anatómica Internus
ajg,anon

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Female orcas can live to be more than 90 years old. Front flipper Whales and dolphins evolved from land mammals, and their fore flippers are modified arms with extended fingers. The rigid structure moves mainly at the shoulder joint. Cartilage 'finger' 242 mammals ° cetaceans Eye patch The shape and colour of ihe pale eye patch varies according to subspecies Prey detector The orca detects prey by echoiocation: sending out loud clicks and picking up the reflected sounds. The dicks are produced In the nasal sacs and directed by the bulging forehead or melon Sensitive tongue Taste buds on the orca s short tongue help it reject any inedible prey. Strong teeth The teeth are stout cones up to I0cm(4in) tong, perfect for gripping slippery, struggling prey. 8 m (6 ft)-the height a male's dorsal fin can reach. Orcas are highly social and live in family groups, or pods, of up to 40 individuals. An orca can swim at speeds of up to 56 km/h (35 mph) 243 Blowhole Like all mammals the orca breathes air. its nostril is a hole in the top 4of Its head, which remains closed while the orca k is underwater. Dorsal fin A female orca has a tall triangular dorsal fin. but this is only half the height of a male’s. The shape of the fin varies, and can be used to identify individual orcas. Hunting together Orcas are among the most intelligent of all animals. They learn fast and can also pass on their knowledge to others. This allows family groups to work together to devise new. often ingenious ways of catching prey. Muscular tail Powerful muscles drive the orca through the water at high speed. Tall flukes The fish like tail has a pair or horizontal fin-tike flukes. Keeping close An orca calf swims dose to its mother, and stays with her for life, even after reaching maturity. MAMMALS 1 ORCA Orcinus orca Location: Worldwide Length: Up to 9.8m (32 ft) Diet: Various marine animals Tempting target A "spyhopping" orca lifts its head from the water to identify prey. Here, one has spotted a Weddell seal on a drifting ice floe near Antarctica. Joint action Swimming In perfect formation, the orcas surge towards the ice floe and dive beneath it. This pushes up a wave that bears down on the floating ice. Orca Also known as the killer whale, the orca is actually a giant dolphin that uses its intelligence and power to stalk and seize prey ranging from small fish to sharks, seals, and even whales. One of the most powerful predators on the planet, the orca prowls the world's oceans in family groups that specialize in hunting particular types of prey. Some are experts at rounding up shoals of fish, using a complex repertoire of sounds to coordinate their group tactics, while others team up to outwit and ambush other marine mammals. Mission accomplished The wave strikes the ice and washes over It in a wall of water. The helpless seal is swept off the floe and into the jaws of the waiting orcas.

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