The humpback whale can reach a maximum length of 17 metres, with the female larger than the male. The size and weight is also impressive. A 15m humpback weighs more than 41,000kg and its heart 190kg.

Breeding

Humpbacks return to the same breeding areas, in warm coastal waters, each year. Solitary males are thought to 'sing' most regularly, perhaps trying to attract a mate. Whales in a breeding stock all tend to sing a very similar song, which is quite different from the songs of whales in other breeding stocks. The songs last from 6-35 minutes, and range in frequency from 40-5,000 Hz.

Mating has never been directly observed, but whales seen diving together and then rising vertically to the surface, belly-to-belly, have been assumed to be mating. Calves stay close to their mothers for at least a year, taking at least 40 litres of milk from them each day for the first five months.

Read More: Humpback Whale and Humans

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