usually differentiated from the fin whale by the colour of their head. Contrary to the fin whale's smooth rostrum, the sei whale's rostrum is curved.

Size

The sei whale is the third-largest balaenopterid, after the blue whale and the fin whale. Adults usually weigh between 15 and 20 MT. They exhibit sexual dimorphism, with females outweighing and being longer than their male counterparts. At birth, a calf typically

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