遊ゆう泳えい動どう物ぶつゆうえいどうぶつMeanings1nounnektonTechnical term in marine biology for aquatic animals that swim actively, as opposed to plankton.遊ゆう泳えい動どう物ぶつには魚ぎょ類るいやイカ、クジラなどが含