Jul 16, 2020 - Blue whale, a species of baleen whale, a cetacean, that is the most massive animal ever to have lived. Weighing approximately 150 tons, ... ... <看更多>

The blue whale (Balaenoptera musculus) is a marine mammal belonging to the baleen whale ..... sightings were made in 2008, since then Porcupine Seabight has ... ... <看更多>