Regal Anthias (Pseudanthias regalis) – Complete Care Guide

General Information

The Regal Anthias (Pseudanthias regalis) is a stunning and vibrant addition to any reef aquarium. Known for their striking purple and yellow coloration, these fish are a favorite among aquarists seeking to add a splash of color to their tanks. Native to the Indo-Pacific region, particularly around the Maldives and Sri Lanka, these fish inhabit deep reef slopes and are often found in large schools.

Regal Anthias are part of the subfamily Anthiinae, which is renowned for its dazzlingly colorful members. They are often confused with other anthias species, such as Pseudanthias tuka, but can be distinguished by their more subdued purple hues and the unique yellow dorsal fin that gives them their regal appearance.

Care

Regal 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 are sensitive to water quality, so maintaining stable parameters is crucial. They prefer moderate to high water flow, which helps replicate the currents of their natural habitat.

Due to their active nature, a tank size of at least 300 liters is recommended. They are best kept in groups, as they are naturally schooling fish. A harem setup, with one dominant male and several females, is ideal to replicate their social structure in the wild.

Diet and Feeding

In the wild, Regal Anthias are planktivores, feeding on zooplankton and other small organisms suspended in the water column. In captivity, they should be offered a varied diet that includes high-quality frozen foods such as mysis shrimp, brine shrimp, and finely chopped seafood. Enriched foods and marine-specific pellets can also be included to ensure balanced nutrition.

Feed them small portions multiple times a day to mimic their natural feeding habits. This frequent feeding schedule helps maintain their energy levels and vibrant coloration.

Behavior and Compatibility

Regal Anthias are generally peaceful and make excellent additions to community reef tanks. However, they can be shy and may take some time to acclimate to their new environment. Once settled, they are active swimmers and will often occupy the mid-water column.

These fish are best kept in groups, with a single male and multiple females to reduce aggression. Males can become territorial, especially if there are multiple males in the same tank. They are compatible with other peaceful reef fish but should not be housed with overly aggressive or boisterous species that may outcompete them for food.

Reproduction

Like many anthias, Regal 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 due to their specific environmental and dietary needs. However, observing their social dynamics and courtship behaviors can be fascinating for aquarists.

Health and Common Issues

Regal Anthias are moderately hardy but can be prone to stress and disease if not provided with optimal conditions. They are particularly susceptible to marine ich and other parasitic infections. Quarantining new additions and maintaining excellent water quality are essential to their health.

When selecting a Regal Anthias, look for individuals with vibrant coloration, clear eyes, and active swimming behavior. Avoid fish that appear lethargic or have visible signs of disease.

Habitat

In the wild, Regal Anthias are found in the Indo-Pacific region, often inhabiting deep reef slopes and drop-offs. They prefer areas with strong currents and plenty of planktonic food. Replicating these conditions in captivity, including moderate to high water flow and a diet rich in planktonic foods, will help them thrive.

Common name: Regal Anthias