Select the fish.

 - seahorse
 - green iguana
 - green tree frog
 - bottlenose dolphin
A green tree frog is an amphibian. It has moist skin and begins its life in water.
There are many kinds of tree frogs. Most tree frogs are very small. They can walk on thin branches.
A green iguana is a reptile. It has scaly, waterproof skin.
Iguanas are a type of lizard. Iguanas eat plants and fruit.
A seahorse is a fish. It lives underwater. It has fins, not limbs.
Seahorses live in shallow, warm water. They can use their tails to hold on to plants.
A bottlenose dolphin is a mammal. It has hair and feeds its young milk.
Dolphins may look like sharks or other fish, but they are mammals! When a baby dolphin is born, it has hair around its jaw. This hair falls out as the dolphin grows.