This swimming method is called the eel-type, and it can be seen in fish with similar body shapes, such as moray eels, hamo (common Japanese conger) and anago (conger eels).
このような遊泳方法はウナギ型と呼ばれ、ウツボやハモ、アナゴなどウナギと似た体型の魚に見られる。