Sei Whale: (Balaenoptera borealis) Sei whales can reach a length of 18.5 meters (60 feet) and a weight of 29.1 metric tonnes (32 tons). They feed primarily on krill and other small crustaceans, but also feed at times on small fish. The sei whale is the fastest of the baleen whales and can reach speeds of more than 33 km per hour (20 mph). Although less is known about the numbers of sei whales than some others species, they were also severely impacted by commercial whaling.

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