Can you explain grazing halos around coral reef features?
user
Grazing halos are areas of bare sand surrounding coral reefs that are created by herbivorous fish eating algae and sea grass. In some places, halos stretch over 100 meters across, whereas in others, they are less than 10 meters in diameter, with the size of the halo thought to represent the farthest distance that grazing fish and invertebrates venture out from the relative safety of the reef.
assistant
OK. But why are the grazing halos specifically around coral reefs though?
user