Select the fish.

 - humpback whale
 - piranha
 - zebra
 - gharial
A gharial is a reptile. It has scaly, waterproof skin.
Gharials are a type of crocodile. Gharials live near rivers and eat fish.
A zebra is a mammal. It has hair and feeds its young milk.
Zebras eat mostly grass. But they sometimes eat other types of plants, such as shrubs or tree bark.
A humpback whale is a mammal. It has hair and feeds its young milk.
Whales are mammals that live in the ocean. Humpback whales have small hairs that grow from bumps around their mouth.
A piranha is a fish. It lives underwater. It has fins, not limbs.
Piranhas have sharp teeth. Piranhas hunt in groups. A group of piranhas can eat a large animal.