Very special thanks for the first three photos of Lutjanus inermis to Dr. Gerry R. Allen, Australia.
This reef-associated species inhabits coastal rocky and coral reefs up to at least 40m depth. During the day they form schools of 30 or more individuals, which sometimes remain stationary. Juveniles are effective mimics of the damselfish Chromis atrilobata and are often seen swimming with them.
Source: IUCN Red List