いるか (iruka) means “dolphin” | MotiTan Japanese Dictionary

More examples

水族館でいるかのショーを見ました。sui zoku kan de i ru ka no shō o mi ma shi ta

I watched a dolphin show at the aquarium.

Describes a highly social sea mammal that uses its streamlined body to travel quickly through the water.

海中を群れで泳ぎ、魚や小動物を食べる、細長い体形の哺乳類。kai chū o mu re de oyo gi sakana ya shō dō butsu o ta be ru hoso naga i tai kei no ho nyū rui

いるか (iruka, "dolphin") is an old Japanese native word, and the history of its formation is not certain.

In conversational English, dolphin can describe both a wild animal and a trained performer at a marine park, depending on the surrounding context.