Sei whale, balaenoptera borealis, part of the rorquals.
Sei whales are very endangered, they have a population of 28,000 individuals.
They have a lifespan of 70 years.
Sei whales live in subtropical, temperate, and subpolar waters.
Like the Atlantic, Indian, and Pacific oceans.
They have thick blubber which keeps them warm in the cold ocean water.
Sei whales are carnivores, they feed on plankton, copepeds, and krill.