Common name: Red-bar Anthias

General Information

The Red-bar Anthias (Pseudanthias cooperi) is a stunning and vibrant addition to any marine aquarium. Known for its striking coloration, this species showcases a blend of pink, orange, and red hues, with a distinctive red bar running vertically across its body. This anthias is a member of the Serranidae family, which also includes groupers and sea basses. Its beauty and relatively peaceful nature make it a popular choice among intermediate and advanced aquarists.

Native to the Indo-Pacific region, the Red-bar Anthias can be found in reef environments ranging from the Maldives to Fiji. It is a schooling fish in the wild, often seen in large groups hovering above coral reefs. This behavior not only makes them visually captivating but also highlights their need for social interaction in captivity.

Care

Red-bar Anthias require a well-established aquarium with plenty of swimming space and hiding spots. They thrive in tanks with live rock structures that mimic their natural reef environment. These fish prefer stable water conditions and are sensitive to fluctuations in parameters, making them better suited for experienced aquarists.

A tank of at least 300 liters (80 gallons) is recommended for a small group, as these fish are active swimmers and need ample space. Strong water flow and high oxygenation are essential to replicate their natural habitat. Dim lighting or shaded areas in the tank can help them feel more secure, as they are naturally found in deeper reef zones.

Diet and Feeding

In the wild, Red-bar Anthias are planktivores, feeding on zooplankton and other small organisms. In captivity, they require a varied diet to maintain their vibrant coloration and health. Offer a mix of high-quality frozen foods such as mysis shrimp, brine shrimp, and finely chopped seafood, along with specialized marine pellets or flakes.

Feed them small portions multiple times a day, as their high metabolism demands frequent feeding. Ensuring a varied diet will not only keep them healthy but also enhance their natural colors.

Behavior and Compatibility

Red-bar Anthias are generally peaceful and do well in community reef tanks. They are best kept in small harems, with one dominant male and several females. This setup mimics their natural social structure and helps reduce stress and aggression.

While they are not aggressive, they can be shy, especially when first introduced to a new tank. Providing plenty of hiding spots and a calm environment will help them acclimate. Avoid housing them with overly aggressive or territorial species, as this can lead to stress and health issues.

Reproduction

Like many anthias, Red-bar 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 and challenging, as it requires precise environmental conditions and a well-established harem.

The male will court females with a series of displays, including rapid swimming and fin flaring. Eggs are typically released into the water column, making it difficult to collect and rear the fry in a home aquarium setting.

Health and Common Issues

Red-bar Anthias are relatively hardy but can be prone to stress-related illnesses if their environment is not optimal. Maintaining stable water parameters, a proper diet, and a peaceful tank environment are key to their health.

Common issues include ich and bacterial infections, often triggered by poor water quality or stress. Quarantining new additions and providing a stress-free environment can help prevent these problems. Regular observation and prompt treatment of any signs of illness are essential.

Habitat

In the wild, Red-bar Anthias inhabit coral reefs and drop-offs at depths ranging from 10 to 50 meters (35 to 165 feet). They are native to the Indo-Pacific region, including areas such as the Maldives, Indonesia, and Fiji. These fish prefer areas with strong currents and plenty of planktonic food sources.

To replicate their natural habitat, provide a tank with moderate to strong water flow, live rock for shelter, and open swimming areas. Ensuring a stable and nutrient-rich environment will help them thrive in captivity.