Common name: Blue-green Damsel

General information

The Blue Star Damselfish, scientifically known as Pomacentrus callainus, is a vibrant and active fish that adds both color and dynamism to a saltwater aquarium. This species is known for its striking blue coloration, with a dark spot at the base of the pectoral fin, which resembles a star and gives it its common name. They are relatively small, reaching up to about 3 inches in length, and are often favored for their hardiness and adaptability to aquarium life.

Care

Blue Star Damselfish are hardy and can be a good choice for both beginner and experienced aquarists. They thrive in well-established aquariums with plenty of rockwork and hiding spaces. While they are generally peaceful, they can become territorial, especially towards conspecifics or similar-sized fish. It's important to monitor their behavior to prevent aggression in the tank. A varied diet of meaty foods, algae, and high-quality marine flake or pellet food will help maintain their health and coloration.

Reproduction

In the wild, Blue Star Damselfish are known to be demersal spawners, laying their eggs on substrates where the male will guard and aerate them until they hatch. Breeding them in captivity can be challenging but is possible with the right conditions and a well-maintained breeding tank.

Habitat

Native to the Western Pacific, the Blue Star Damselfish is commonly found in coral-rich areas and lagoons. They prefer environments with abundant live rock or coral formations that provide shelter and feeding opportunities. In the wild, they are typically found at depths ranging from shallow waters to about 40 meters.