Saddle Wrasse and Butterflyfish feeding on eggs of Domino Damselfish

The Hawai'ian Domino Damselfish, aka white-spotted damsel, is endemic to Hawai‘i, which means they occur nowhere else on Earth.
The Hawaiian Saddle Wrasse, aka Hīnālea Lauwili, is also endemic to the islands and found nowhere else in the world. 
Damsel eggs are a significant food source on the reef. Butterflyfish together with Saddle Wrasse are notorious egg eaters on the reef, forming a 'trophic mob' to feed on the ova (eggs) of nesting damselfish, creating a colorful feeding frenzy.
The Hawai'ian Domino Damselfish defends its nest until the eggs hatch, being vulnerable to predation as it nests on vertical surfaces, boulders, ledges, and flat open areas within the reef. 
 
Hawaiian Saddle Wrasse
Scientific Name: Thalassoma duperrey
 
Hawaiian Domino Damselfish
Scientific Name: Dascyllus albisell