flippers和fin有啥区别

flipper: (海豹、企鵝等海洋生物用來游泳的）鰭肢，鰭足, 阔鳍，

Whales , seals , penguins , and turtles have flippers.

fin: 鰭；（飛機的）翼（片）；鰭狀物

We could see the fin of a shark as it slowly circled our boat.