一只躺在沙滩上的港海豹幼崽，德国黑尔戈兰岛

aquatic mammal animal mammal outdoor marine mammal water dolphin fish blue whale aquarium flock bird sunset wave sky ocean swimming shark underwater fin cartilaginous fish flying lake group sea several ice frozen day sea cow elephant rays and skates sea lion great white shark cetacea harbor seal stingray bottlenose dolphin common bottlenose dolphin seal transport sailing vessel boat