The Blue Damselfish, also known as Blue Devil, is a shy fish from the tropical Indo-Pacific. The body is elongated striking blue in color. Each scale has a light mark, and a black spot may be present at the rear of the long-based dorsal fin. The head has some black markings as well.

Positive identification of this fish is often confused as the dark markings may vary, and some specimens may even develop yellow body coloring as they mature.

It is recommended to keep Blue Damsels either by themselves or in groups of six or more. Anything in between will often result in fighting.

Tank Setup

The tank should be decorated with coral and various other hiding places, as this fish will often head for cover when frightened. The Blue Damselfish can be kept with other fishes of the same size, however it can be a fin-nipper.

Feeding

The Blue Damselfish spends most of the day swimming about the aquarium looking for food. As an omnivore, it feeds on small live food, as well as vegetable matter such as lettuce.

Water Chemistry

A salinity of 1.025 and temperature between 75-79 degrees F is recommended. If kept in proper conditions the fish lives a long and active life.

Breeding

Successful breeding of Blue Damsels has been accomplished in the aquarium but information is sketchy. The female lays the eggs on pre-cleaned flat surfaces. Both parents guard the eggs and fry.