Common name: Green sergeant

General information

The Yellowtail Demoiselle, scientifically known as Amblyglyphidodon batunai, is a small and vibrant damselfish species that is relatively new to the aquarium trade. It is recognized by its striking yellow tail and the deep blue to black body. This species is not as commonly kept as some other damselfish, but it can be a colorful addition to a reef or fish-only aquarium.

Care

Yellowtail Demoiselles are hardy fish that can adapt to a range of aquarium conditions. They are best kept in tanks with plenty of live rock for hiding and grazing. While they are generally peaceful, they can become territorial, especially in smaller tanks. It's important to monitor their behavior with tank mates and provide ample space for each fish to establish its own territory.

Reproduction

In the wild, Amblyglyphidodon batunai forms breeding pairs or small harems. They are egg-layers, with the female depositing eggs on a flat surface, which are then fertilized by the male. The male guards the eggs until they hatch. In the aquarium, breeding is less common but can be encouraged with stable conditions and well-matched pairs.

Habitat

The Yellowtail Demoiselle is found in the Western Pacific, particularly around Indonesia and the Philippines. They inhabit coral-rich areas and lagoons, often swimming in small groups. They are typically found at depths ranging from shallow waters to about 20 meters.