Commensalism
Shrimp and crab benefit from eating food inside the anemones.

Commensalism
A pearlfish spends the day inside of the sea cucumber and comes out at night to feed.

Mutualism
An Alpheid Shrimp digs a hole and hides while the Goby fish watches for predators and signals to the shrimp when it's safe to come out.

• AN ALPHEID SHRIMP DIGS A HOLE WHILE THE GOBY FISH SITS AND SIGNALS FOR A SAFE TIME TO COME OUT TO EAT.

Commensalism
Imperial Shirmp ride on sea cucumbers to get to larger areas to find food.

Commensalism
Some barnacles attach to sea turtles and whales to get food in nutrient- rich waters.