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the Killer Whales are impressive and smart

mikdbow (Premium member) > albums > Antarctica

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Orcas are distinctively marked, with a black back, white chest and sides, and a white patch above and behind the eye. Calves are born with a yellowish or orange tint, which fades to white. Orcas have a heavy and stocky body and a large dorsal fin with a dark grey "saddle patch" at the fin's rear. Antarctic Orcas may have pale grey to nearly white backs. Males can range from 6-8 metres long (19-26 ft) and weigh in excess of 6 tonnes; it has been reported that especially large males have reached nearer 8 tonnes (17,636 lb). Females are smaller, growing from 5-7 m (16-23 ft) and a weight of about 4 to 5 tonnes. However, an adult Orca's weight can be anywhere from 2,585 to 7,257 kg (5,700 to 16,000 lb), although males are heavier than females. The largest Orca ever recorded was a male off the coast of Japan, measuring 9.8 m (32 ft) and weighed over 8 tonnes (17,636 lb). Calves at birth weigh about 180 kg (350-500 lb) and are about 2.4 m long (6-8 ft). The Orca's large size and strength make them the fastest marine mammals, often reaching speeds in excess of 56 km/h (35 mph). Unlike most dolphins, the pectoral fin of an Orca is large and rounded — more of a paddle than other dolphin species. Males have significantly larger pectoral fins than females. At about 1.8 m (6 ft), the dorsal fin of the male is more than twice the size of the female's, and is more of a triangle shape — a tall, elongated isosceles triangle, whereas the dorsal fin of the female is shorter and generally more curved.

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