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Fin whales are usually born in the late fall or early winter (November-December in the Northern Hemisphere, May in the Southern Hemisphere) at a length of 19.5-21 ft. They are weaned when they are 6-8 months old at a length of 36-39 ft. They reach sexual maturity when they are 8-10 years old at a length of anywhere between 54 and 65 feet (depending on region), and reach physical maturity when they are about 25 years old at a length of 62 to 72 ft. Females will calf every two to three years. They can live over 100 years.

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12y ago

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