Golden sweeper

Golden sweepers are nocturnal creatures, spending the day time hiding in schools under rocks and coral formations. They have luminescent strips by their chests and anuses. It is said that they attain this bioluminescence by eating things like sea-fireflies and plankton.

Scientific Name
Parapriacanthus ransonneti
Order: Perciformes, Family: Pempheridae
South of Chiba Prefecture, Indian Ocean, Pacific Ocean