What works for the damselfish might not be so good for the reef.

Explain why the dead coral dulls the sense of the damselfish.

So she argues that damselfish could use their spots to send a covert message.

What the damselfish experiments have demonstrated clearly, he says, is that these fish can use UV to distinguish species.

So the relationship works for both parties: the damselfish gets a steady supply of food and the alga avoids competition.

It seems the damselfish turned to farming red algae because they lack the enzymes needed to digest many common algal species.

Divers watch a yellowtail damselfish nibble on algae growing from the sculpture's pant leg, which its creators hope will eventually sprout colorful coral.

In tests, Siebeck and her colleagues found that male Ambon damselfish could tell their own species from another just by seeing the ultraviolet markings.

After about an hour of swimming around with angelfish, yellowtail damselfish, and tarpon, we reached an enclosed amphitheatre surrounded by walls of questionable rock.

This suggests damselfish behaviour may be contributing to an increase in the disease, though Casey points out that rising temperatures have a much bigger impact.

Damselfish were then raised in a similar set of conditions, and relocated to coral reefs in the wild.

The fish that farms alga Damselfish are one of the most abundant fish on coral reefs across the world, from the Caribbean to Indonesia.

What works for the damselfish might not be so good for the reef.

Explain why the dead coral dulls the sense of the damselfish.

So she argues that damselfish could use their spots to send a covert message.

What the damselfish experiments have demonstrated clearly, he says, is that these fish can use UV to distinguish species.