Sei Whales
Sei whales is a group of large whales.
They are the third largest whales after Blue Whales and fin whales. They all belong to one species - Balaenoptera borealis.
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Like the other two, they belong to the group of baleen whales and rorquals. They can be up to 20 meters long and weigh up to 45 tonnes. They are filter feeders and they eat almost 1 tonne food every day. They are also some of the fastest swimmers and can swim as fast as 50km/h. They prefer to live in deep ocean waters but they don't dive very deep. They are found in almost all oceans except tropical and polar waters. Like other large whales, they migrate between feeding and breeding grounds and they make loud low frequent noises.
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They often swim alone but sometimes in small groups. Feeding groups can be large.
During the whaling days, they were less profitable than Blue, Humpback and Fin Whales.
But once those three started to diminish, Seis were taken and their populations ended up decreasing by 80%. There are now about 55,000 of them left.
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