Anemonefishes are a group of damselfishes “that exclusively live symbiotically with sea anemones,” researchers said in a July 10 study published in the peer-reviewed journal ZooKeys.

Life at the top of the rock can contend with periodically drying out. Starfish and sea anemones at the bottom, on the other hand, cannot tolerate being sun-baked.

Anemonefishes are a group of damselfishes “that exclusively live symbiotically with sea anemones,” researchers said in a July 10 study published in the peer-reviewed journal ZooKeys.