They can use them taste, grab, and smell things. 

You may also like...

Image of a bird

The American Bittern

Starfish are carnivores and eat critters like clams, oysters, and mussels. And clams can flee predators. 

image of two shrimps

Shrimp farmers will remove or crush the eyes of females to make them breed faster—this is called eyestalk ablation

Image of a tripod fish standing on the ocean floor

Tripod Fish Can Stand On Their Fins As They Wait For Food To Pass By

Image of a hermit crab in a shell

Hermit Crabs Can Live Up To 30 Years In The Wild But Average 3-12 Years As Pets

Antarctica is one of the driest places on Earth