It is the fastest of the great whales and can swim at about 23 mph (20 knots) in short bursts. Sei whales appeared off the coast of Norway at the same time as the pollock, both coming to feed on the abundant plankton.

Often found with pollack in Norway, the name \"sei\" comes from the Norwegian word for pollack, \"seje.\"
The Sei whale is also called the Sardine whale, the Pollack whale, the Coalfish whale, the Japan Finner, and Rudolphi's rorqual. Whales are at the top of the food chain and have an important role in the overall health of the marine environment.

In Japanese, the whale was called iwashi kujira, or sardine whale, a name originally applied to Bryde's whalesby early Jap…

In the Pacific, the whale has been called the Japan finner; "finner" was a common term used to refer to rorquals. Sei whales occur in subtropical, temperate, and subpolar waters around the world. Sei is the Norwegian word for pollock, also referred to as coalfish, a close relative of codfish. The specific name is the Latin word borealis, meaning northern. Large numbers of these whales were hunted until recently for their oil and meat. The sei whale became a major target for commercial whaling after the preferred stocks of blue and fin whales had been depleted. They are also highly vulnerable to human activities in the ocean. practice of killing and hunting whales mostly for human consumption