Noun: Balaenoptera musculus
- Largest mammal ever known; bluish-grey migratory whalebone whale mostly of Southern Hemisphere
"The Balaenoptera musculus's enormous fluke disappeared beneath the waves";
- blue whale, sulfur bottom [N. Amer], sulphur bottom [Brit, Cdn]
Type of: baleen whale, whalebone whale
Part of: Balaenoptera, genus Balaenoptera
Encyclopedia: Balaenoptera musculus