pygmy killer whale
A small cetacean species (Feresa attenuata). The name is a biological term; in everyday contexts, it may be unfamiliar.
The pygmy killer whale is a small whale that lives in tropical seas.
Ateji kanji spelling; rarely used and potentially confusing.
Compound of 夢 (yume, 'dream') and 巨頭 (gondō, from 巨頭鯨 gondōkujira, 'pilot whale'), literally 'dream pilot whale'. The exact origin of the name is uncertain; it may refer to its elusive nature or resemblance to pilot whales.