rorqual

Any of several baleen whales of the family Balaenopteridae having longitudinal grooves on the throat and a small, pointed dorsal fin, and including the blue whale and the humpback whale.

A finner-whale of the genus Balænoptera, having short flippers, a dorsal fin, and the throat plicated.

A very large North Atlantic whalebone whale (Physalus antiquorum, or Balænoptera physalus). It has a dorsal fin, and strong longitudinal folds on the throat and belly. Called also razorback.

Any whale with longitudinal skin folds running from below the mouth to the navel, allowing the capacity of the mouth to expand greatly when feeding.

any of several baleen whales of the family Balaenopteridae having longitudinal grooves on the throat and a small pointed dorsal fin