Common name: Threadfin Anthias

General Information

The Threadfin Anthias (Nemanthias carberryi) is a stunning and active fish that adds a splash of color and movement to any marine aquarium. Known for their vibrant pinkish-orange bodies and yellow dorsal fins, these fish are a favorite among reef enthusiasts. Native to the Indian Ocean, particularly around the Maldives and Seychelles, they are often found in large schools hovering above coral reefs.

Threadfin Anthias are sexually dimorphic, with males displaying more vivid coloration and elongated dorsal and caudal fin filaments. This species is relatively peaceful and thrives in groups, making them an excellent choice for aquarists looking to create a dynamic and natural-looking reef environment.

Care

Threadfin Anthias require a well-established aquarium with stable water parameters. They are best kept in groups, as they exhibit natural schooling behavior, which helps reduce stress and brings out their best colors. A tank with plenty of swimming space and live rock for hiding is ideal. Strong water flow mimicking their natural reef environment is also recommended.

These fish are moderately challenging to care for due to their specific dietary needs and sensitivity to water quality. Regular feeding with a variety of high-quality foods and maintaining pristine water conditions are essential for their health and longevity.

Diet and Feeding

In the wild, Threadfin Anthias are planktivores, feeding on zooplankton in the water column. In captivity, they should be offered a varied diet that includes frozen mysis shrimp, brine shrimp, and high-quality marine pellets or flakes. Feeding small amounts multiple times a day is crucial, as their high metabolism requires frequent nourishment.

Supplementing their diet with vitamin-enriched foods can help maintain their vibrant coloration and overall health. Ensuring a consistent feeding schedule will keep them active and thriving.

Behavior and Compatibility

Threadfin Anthias are peaceful fish that do well in community tanks with other non-aggressive species. They are best kept in harems, with one dominant male and several females. This social structure mimics their natural behavior and helps reduce aggression within the group.

While generally peaceful, males may display territorial behavior towards other males, especially in smaller tanks. Providing ample space and hiding spots can help mitigate this. They are compatible with a wide range of reef-safe fish, invertebrates, and corals, making them a versatile addition to mixed-species aquariums.

Reproduction

Threadfin Anthias are protogynous hermaphrodites, meaning all individuals are born female, and the dominant individual in a group will transition to male. Breeding in captivity is rare but possible with the right conditions. A large, stable tank with a well-established harem and consistent feeding can encourage spawning behavior.

The female lays eggs in the water column, which are then fertilized by the male. The eggs and larvae are planktonic, making them challenging to rear in captivity due to their specific dietary and environmental needs.

Health and Common Issues

Threadfin Anthias are relatively hardy but can be prone to stress-related illnesses if water quality is not maintained. They are susceptible to common marine diseases like ich and velvet. Quarantining new additions and maintaining excellent water quality are essential preventive measures.

When selecting a Threadfin Anthias, look for active individuals with vibrant coloration and no visible signs of disease. Providing a stress-free environment with plenty of hiding spots and a proper diet will help ensure their health and longevity.

Habitat

In the wild, Threadfin Anthias inhabit coral reefs and lagoons at depths of 10 to 40 meters. They are native to the Indian Ocean, including areas around the Maldives, Seychelles, and Madagascar. These fish prefer areas with strong currents, where they can feed on plankton carried by the water flow.

Replicating their natural habitat in a home aquarium involves providing plenty of swimming space, live rock for shelter, and moderate to strong water flow. A well-lit tank with a mix of open water and hiding spots will help them feel secure and display their natural behaviors.