Extinct Mammals : Sei Whale
A smaller relative of the fin whale, the average length of the Atlantic Ocean males is 13 m; females are slightly larger. The largest measured female sei whale was 18 m in length.
In the western Atlantic, they migrate from Florida to Labrador and leave northern waters before September. They also occur all summer long off Canada’s West coast.
Normally found far off shore, they frequently feed on the surface by trapping schools of small fish or plankton.
These relatively small, lean whales are less profitable for whalers than the much larger blue whale. Nonetheless, fewer than 70,000 of the creatures are estimated to remain.
They are also preyed upon by killer whales.