অর্থ : Predatory black-and-white toothed whale with large dorsal fin. Common in cold seas.
সমার্থক : killer, killer whale, orca, orcinus orca, sea wolf
অর্থ : Slaty-grey blunt-nosed dolphin common in northern seas.
সমার্থক : grampus griseus
Grampus meaning in Bengali (Bangla).