三姐妹泉中的西印度海牛妈妈和它的宝宝，美国佛罗里达州

water pool swimming marine mammal aquarium reef blue animal fish shark nature dolphin whale fin lake sea lion harbor seal underwater swimming pool aquatic mammal cave mountain outdoor bear indoor plastic beach ocean aqua island turquoise shore azure wave marine biology common bottlenose dolphin bottlenose dolphin wholphin cartilaginous fish cetacea common dolphins killer whale