Rising ocean temperatures have caused corals around the world to lose their color. This bleaching happens when stressed corals expel the algae normally living in their tissues. That leaves once-colorful reefs white. But corals aren’t the only ocean organisms changing their color. 

Frogfish often camouflage themselves to blend in with their surroundings. This helps them capture prey that swim past. Scientists diving in the Maldives, an island nation in the Indian Ocean, found that frogfish living on bleached reefs have adapted by turning white to match the coral. If the reefs recover, the frogfish will probably adopt their usual bright coloring again, says expedition researcher Gabriel Grimsditch of the International Union for Conservation of Nature.