|simpl. and trad.|
|Kanji in this term|
|Grade: 2||Grade: S|
/iwo uka/ > /iru uka/ > /iruka/
However, Murayama proposes that it was a borrowing from Ainu iriku 'whale'.
The 海豚 spelling is an example of ateji. The characters literally mean “sea pig”.
- 鯆 (rare)
- a dolphin (the mammal)
As with many terms used in biology, this is commonly spelled in katakana, as イルカ.