Bryaninops erythrops is characterized by semi-transparent head and body with white internal pigment over brain; upper surface of vertebral column white internal white stripe. Lower half of body obscured by reddish brown to violet brown or purple streak. The eyes are yellow with a red ring.

Has not yet been assessed for the IUCN Red List.

Indo-Pacific: Chagos Islands, Philippines, Great Barrier Reef, Fiji, and Samoa; Mariana, eastern Caroline and Marshall Islands in Micronesia.
Reef-associated, lives on certain branching coral forms of fire coral (Millepora spp.) and on other massive corals ones in shallow lagoons at depths of 1 to 10 m.

Eggs are attached to a substrate, such as vegetation, coral, or a rock surface.
After fertilizing the eggs, the male guards the eggs from predators and keep them free from detritus. The male fans the eggs, thereby providing them with oxygen. The female maintains the small hole. The eggs hatch after a few days. The larvae are born transparent, and they develop coloration after spreading to find a suitable habitat.