Common name: Earle's Splitfin

General Information

Earle's Splitfin (Luzonichthys earlei) is a stunning and relatively rare species of anthias that captivates aquarists with its vibrant coloration and graceful swimming behavior. This species is named after ichthyologist Dr. John L. Earle and is a prized addition to reef aquariums due to its striking appearance and peaceful demeanor. Found in deeper reef environments, it is a deepwater species that requires specific care to thrive in captivity.

The species is known for its vivid pinkish-red body, accented by a yellow dorsal fin and a subtle lavender hue along its flanks. Its small size and schooling nature make it an excellent candidate for aquariums designed to replicate the beauty of a natural reef. However, its rarity in the trade and specific care requirements make it more suitable for experienced hobbyists.

Care

Earle's Splitfin requires a well-established reef aquarium with pristine water quality and plenty of hiding spots. Due to its deepwater origins, it thrives in dimly lit tanks or setups with blue-spectrum lighting that mimics its natural habitat. A peaceful environment with minimal aggression from tank mates is essential for its well-being.

This species is best housed in a tank with a minimum volume of 200 liters, as it requires ample swimming space and benefits from being kept in small groups. Live rock structures with overhangs and caves provide the security it needs to feel comfortable. Stable water parameters and consistent feeding are critical to its health.

Diet and Feeding

In the wild, Luzonichthys earlei primarily feeds on planktonic organisms. In captivity, it should be offered a varied diet of high-quality frozen foods such as mysis shrimp, cyclops, and enriched brine shrimp. Supplementing with small-sized pellets or flakes designed for carnivorous marine fish can help ensure balanced nutrition.

Frequent feeding, ideally three to four times a day, is recommended due to its high metabolism. Small portions at each feeding session prevent overfeeding and maintain water quality. Providing a mix of foods helps replicate its natural diet and keeps it healthy and vibrant.

Behavior and Compatibility

Earle's Splitfin is a peaceful and social species that thrives in groups. It forms tight schools in the wild and exhibits similar behavior in captivity. Keeping them in groups of at least five individuals helps reduce stress and encourages natural schooling behavior.

While generally peaceful, it may become timid if housed with overly aggressive or boisterous tank mates. Ideal companions include other peaceful reef fish such as gobies, fairy wrasses, and smaller tangs. Avoid housing them with large predatory species that may view them as prey.

Reproduction

Little is known about the breeding behavior of Luzonichthys earlei in captivity. Like other anthias, it is likely a protogynous hermaphrodite, meaning individuals start as females and the dominant individual in a group transitions to male. Breeding attempts in home aquariums are rare, and successful rearing of fry has not been documented.

Health and Common Issues

Maintaining stable water parameters is crucial for the health of Luzonichthys earlei. It is sensitive to poor water quality and sudden changes in conditions. Regular water changes, efficient filtration, and careful monitoring of ammonia, nitrite, and nitrate levels are essential.

When selecting a specimen, look for active individuals with vibrant coloration and no signs of disease. Quarantine new additions to prevent the introduction of parasites or illnesses into the main tank. Common health issues include stress-related diseases and nutritional deficiencies, which can be mitigated with proper care and a balanced diet.

Habitat

Earle's Splitfin is native to the Indo-Pacific region, particularly around deep coral reefs in areas such as the Philippines, Palau, and Indonesia. It is typically found at depths ranging from 40 to 70 meters, where it inhabits steep reef slopes and drop-offs. The species prefers areas with moderate to strong currents, which bring a steady supply of planktonic food.

Replicating its natural habitat in captivity involves creating a reef-like environment with plenty of vertical space, subdued lighting, and moderate water flow. This setup helps mimic the conditions of its deepwater home and supports its natural behaviors.