Common name: Blackspot Sergeant

General Information

The Blackspot Sergeant, scientifically known as Abudefduf sordidus, is a captivating species often found in the shallow waters of coral reefs and rocky shorelines. Known for its distinctive black spot at the base of the pectoral fin, this species displays a muted coloration compared to its more vibrantly hued damselfish relatives. Despite its common name "Dirty Sergeant," this fish is anything but dull, offering a unique charm with its subtle yet striking appearance.

While not as commonly kept as other damselfish species, the Blackspot Sergeant holds interest among hobbyists for its hardiness and adaptability. Its presence in the aquarium can add a touch of the wild, given its natural habitat spanning the Indo-Pacific region from the Red Sea to the Hawaiian Islands.

Care

Caring for the Blackspot Sergeant is relatively straightforward, making it suitable for hobbyists with moderate experience. They prefer well-established aquariums that mimic their natural reef environment, complete with plenty of swimming space and hiding spots. Live rock structures are beneficial, providing both shelter and foraging opportunities.

These fish are known for their adaptability, thriving in a range of conditions typical of marine aquariums. However, maintaining stable water parameters is crucial for their health and well-being.

Diet and Feeding

As omnivores, Blackspot Sergeants have a varied diet in the wild, feeding on algae, small invertebrates, and zooplankton. In captivity, they accept a wide range of foods, including high-quality flakes, pellets, and frozen foods like brine shrimp and mysis shrimp.

Feeding should occur once or twice daily, ensuring that portions are appropriate to prevent overfeeding and maintain water quality. A varied diet helps support their immune system and enhances their natural coloration.

Behavior and Compatibility

Blackspot Sergeants are known for their semi-aggressive nature, particularly as they mature. They are best kept in larger aquariums where they can establish territories without causing undue stress to tank mates.

These fish are not reef-safe, as they may nip at corals and smaller invertebrates. Care should be taken when selecting tank mates, favoring robust species that can hold their own in a community setting.

Reproduction

Breeding Blackspot Sergeants in captivity is challenging but not impossible. They exhibit typical damselfish reproductive behavior, with males preparing a nest site and courting females. Successful breeding requires stable water conditions and a well-established environment.

Health and Common Issues

With proper care, Blackspot Sergeants can live several years in captivity. They are generally hardy but can be prone to common marine diseases like ich. Regular monitoring of water quality and prompt treatment of health issues are essential.

Habitat

The natural habitat of the Blackspot Sergeant includes coral reefs and rocky areas, often in shallow waters where they can be seen darting among the substrate. Their wide distribution across the Indo-Pacific highlights their adaptability to various marine environments.