Common name: Nahacky's Angelfish

General Information

The Nahacky's Angelfish, scientifically known as Centropyge nahackyi, is a rare and captivating species in the aquarium trade. This diminutive angelfish is prized for its striking coloration and elusive nature, making it a sought-after addition for experienced hobbyists. Its vibrant yellow body adorned with blue and purple accents sets it apart from many other dwarf angelfish.

Named in honor of the renowned aquarist Nahacky, this species is primarily found in the deep waters around Johnston Atoll and the Hawaiian Islands. Due to its limited geographic range and specific habitat preferences, it is less commonly encountered than other angelfish in the trade.

Care

Nahacky's Angelfish is considered moderately challenging to care for, best suited for aquarists with some experience. It thrives in well-established marine aquariums with plenty of live rock for grazing and hiding. A tank of at least 200 liters (around 50 gallons) is recommended to accommodate its active swimming behavior and territorial nature.

Maintaining pristine water quality with stable parameters is crucial for the health of this angelfish. It is also important to provide a diverse aquascape with caves and crevices to mimic its natural reef environment.

Diet and Feeding

In the wild, Centropyge nahackyi is an omnivore, feeding on algae, small invertebrates, and detritus. In captivity, its diet should be varied and include high-quality marine algae, spirulina-based foods, and meaty offerings like mysis shrimp and brine shrimp.

Feeding should occur two to three times daily, with portions small enough to be consumed within a few minutes. This ensures that the fish receives adequate nutrition without compromising water quality.

Behavior and Compatibility

Nahacky's Angelfish is semi-aggressive, particularly towards other dwarf angelfish and similar species. It is best kept as the sole dwarf angelfish in a tank to prevent territorial disputes. While it can coexist with a variety of other marine fish, caution is advised when introducing it to a new tank, as it may become territorial.

This species is generally reef-safe with caution. While it may occasionally nip at coral polyps or clam mantles, providing ample algae and other food sources can help mitigate this behavior.

Health and Common Issues

With proper care, Nahacky's Angelfish can live for several years in captivity. Key to its longevity is maintaining excellent water quality and a balanced diet. Regular observation for signs of stress or illness is important, as this species can be prone to common marine ailments like ich.

When selecting a specimen, look for vibrant colors, clear eyes, and active swimming behavior. Avoid individuals with signs of distress or disease, such as cloudy eyes or frayed fins.

Habitat

Centropyge nahackyi is endemic to the deep reef environments of Johnston Atoll and the Hawaiian Islands, typically found at depths ranging from 20 to 60 meters (65 to 200 feet). These regions are characterized by rocky substrates and abundant coral growth, providing ample hiding spots and grazing areas.

Replicating these conditions in captivity involves creating a habitat with plenty of live rock, moderate water flow, and stable temperatures, ensuring the fish feels secure and comfortable.

Conservation Status

As of the latest assessment in 2010, the International Union for Conservation of Nature (IUCN) classified Centropyge nahackyi as Near Threatened (NT). The primary concerns include its limited distribution and specialized habitat preferences, which make it susceptible to environmental changes and human activities. Sustainable collection practices and captive breeding efforts are crucial to ensure its continued presence in the wild and in the aquarium trade.