Common name: Bartlett's Anthias

General Information

Bartlett's Anthias (Pseudanthias bartlettorum) is a stunning and vibrant reef fish that has become a favorite among marine aquarium enthusiasts. Known for its striking coloration, this species features a gradient of yellow to pinkish-purple hues, making it a standout addition to any reef tank. Native to the Indo-Pacific region, particularly around the Marshall Islands and Palau, Bartlett's Anthias thrives in the wild in schools, often found in reef slopes and drop-offs.

This species is highly sought after for its beauty and relatively hardy nature compared to other anthias species. It is an excellent choice for intermediate to advanced aquarists looking to add a splash of color and dynamic movement to their aquariums. Bartlett's Anthias is also a great candidate for community tanks, provided its specific care requirements are met.

Care

Bartlett's Anthias requires a well-maintained aquarium with stable water parameters. A tank with plenty of live rock for hiding and swimming space is ideal. They prefer tanks with moderate to high water flow, mimicking the currents of their natural reef habitat. While they can adapt to smaller tanks, a larger setup is recommended, especially if you plan to keep a group.

Lighting should be moderate to bright, as this species is accustomed to well-lit reef environments. Regular water changes and a robust filtration system are essential to maintain water quality. Bartlett's Anthias are active swimmers and will appreciate an open swimming area in the tank.

Diet and Feeding

In the wild, Bartlett's Anthias are planktivores, feeding on zooplankton and other small organisms. In captivity, they require a varied diet to thrive. Offer them high-quality frozen foods such as mysis shrimp, brine shrimp, and finely chopped seafood. They will also accept marine-specific pellets and flakes, but these should be supplemented with frozen or live foods to ensure proper nutrition.

Feed them small portions multiple times a day, as they are active feeders with high metabolisms. A consistent feeding schedule will help maintain their vibrant coloration and overall health.

Behavior and Compatibility

Bartlett's Anthias are generally peaceful but can exhibit semi-aggressive behavior, particularly towards conspecifics or similarly shaped fish. They do best in groups, ideally in a harem structure with one male and several females. This setup helps reduce aggression and mimics their natural social structure in the wild.

They are compatible with a wide range of reef-safe fish and invertebrates. However, avoid housing them with overly aggressive or predatory species that may outcompete them for food or stress them out. Bartlett's Anthias are reef-safe and will not harm corals or other invertebrates, making them an excellent choice for reef tanks.

Reproduction

Like many anthias species, Bartlett's 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 challenging but not impossible. A stable environment, proper nutrition, and a well-established social hierarchy are crucial for successful spawning.

The female lays eggs in open water, which are fertilized by the male. The eggs and larvae are planktonic, making it difficult to rear the fry in a typical aquarium setup. Specialized rearing tanks and a diet of rotifers and other microscopic foods are necessary for raising the larvae.

Health and Common Issues

Bartlett's Anthias can live up to 5-7 years in captivity with proper care. They are generally hardy but can be susceptible to common marine diseases such as ich and velvet. Quarantine new additions and maintain excellent water quality to minimize health risks.

When selecting a Bartlett's Anthias, look for individuals with vibrant coloration, clear eyes, and active swimming behavior. Avoid fish that appear lethargic, have torn fins, or show signs of disease.

Routine care includes regular water changes, a varied diet, and monitoring for signs of stress or illness. Providing a stable and enriched environment will go a long way in ensuring their health and longevity.

Habitat

In the wild, Bartlett's Anthias are found in the Indo-Pacific region, particularly around coral reefs in the Marshall Islands, Palau, and other nearby areas. They inhabit reef slopes and drop-offs, often forming schools in areas with strong currents and abundant plankton.

Replicating their natural habitat in captivity involves providing plenty of swimming space, live rock for shelter, and moderate to strong water flow. A well-lit tank with stable water parameters will help them feel at home.