Reeflings

Common name: Longfin Anthias

Scientific name: Pseudanthias ventralis (Randall, 1979)
Male Longfin Anthias (Pseudanthias ventralis)Female Longfin Anthias (Pseudanthias ventralis)
Female Longfin Anthias (Pseudanthias ventralis)
Male Longfin Anthias (Pseudanthias ventralis)
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General Information

The Longfin Anthias (Pseudanthias ventralis), also known as the Longfin Basslet, is a stunning marine fish that belongs to the family Serranidae. Native to the Western Pacific Ocean, this species is admired for its vibrant coloration and graceful appearance. Males are particularly striking with their metallic purple bodies, yellow heads, and intricate purple spotting, while females exhibit a subtler metallic purple with yellow dorsal fins. These fish are found in coral reefs, often hiding in caves or under ledges, and are known for their secretive nature.

Despite their beauty, Longfin Anthias are considered challenging to keep in captivity. They require specific environmental conditions and are best suited for experienced aquarists. Their natural habitat includes depths ranging from 26 to 120 meters, making them accustomed to cooler, stable water temperatures and dim lighting.

Details

Estimated price
Expensive High price due to rarity and collection depth
Recommended minimum volume
200 liter (53 gallons)
Salinity
S.G. 1.023 to 1.026
Temperature
22 to 26 °C (72 to 79 °F)
Acidity
pH 8 to 8.5
Average size
7 cm (3″)
Care level
Difficult Challenging due to specific environmental needs
Diet
Planktivore Feeds on zooplankton like copepods and crustacean larvae
Social
Harem Best kept in harems with one male and several females
Reefsafe
Yes
Aggression
Peaceful Shy and reclusive, especially when newly introduced
Captive bred
No
Conservation status
ExtinctThreatenedLeastConcern

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Perch-like Fishes
    Perciformes
  5. Family
    Groupers
    Serranidae
  6. Genus
    Anthias
    Pseudanthias
  7. Species
    Longfin Anthias
    Pseudanthias ventralis (Randall, 1979)
  8. Synonyms
    Anthias ventralis Randall, 1979
    Anthias ventralis ventralis Randall, 1979
    Pseudanthias ventralis ventralis (Randall, 1979)
  9. Source: GBIF | Global Biodiversity Information Facility

Care

Longfin Anthias thrive in aquariums that replicate their natural reef environment. A tank with plenty of live rock, caves, and overhangs is essential to provide them with hiding spots and a sense of security. These fish are sensitive to water quality and require pristine conditions with stable parameters. A well-established aquarium with a robust filtration system is crucial.

Due to their natural habitat in deeper waters, they prefer dim lighting. Using subdued or blue-spectrum lighting can help mimic their natural environment. They are also highly active swimmers and require a tank with sufficient swimming space.

Diet and Feeding

In the wild, Longfin Anthias feed on zooplankton, including copepods, crustacean larvae, and fish eggs. In captivity, they should be offered a varied diet consisting of high-quality frozen foods such as mysis shrimp, brine shrimp, and finely chopped seafood. Supplementing their diet with enriched foods can help maintain their vibrant coloration and overall health.

Feed them small portions multiple times a day to replicate their natural feeding habits. Ensuring a balanced diet is key to preventing nutritional deficiencies and promoting longevity.

Behavior and Compatibility

Longfin Anthias are generally peaceful but can be shy and reclusive, especially when first introduced to a new environment. They are best kept in small groups with a dominant male and several females, as they exhibit a haremic social structure. This setup helps reduce stress and encourages natural behaviors.

They are compatible with other peaceful, reef-safe fish but may become stressed in the presence of aggressive or overly active tank mates. Providing plenty of hiding spots can help them feel secure and reduce territorial disputes.

Reproduction

Like many anthias species, Longfin Anthias are protogynous hermaphrodites, meaning individuals start life as females and can change to males if needed. In a group, the largest and most dominant individual becomes the male, while the others remain female. Breeding in captivity is rare due to their specific environmental requirements and the challenges of raising larvae.

Health and Common Issues

Longfin Anthias are sensitive to water quality and prone to stress-related illnesses if their environment is not optimal. Common issues include ich and bacterial infections, which can be prevented with proper quarantine procedures and maintaining stable water parameters. Regular monitoring and prompt treatment are essential to ensure their health.

When selecting a specimen, look for active and alert individuals with vibrant coloration and intact fins. Avoid fish that appear lethargic or have visible signs of disease.

Habitat

Longfin Anthias are native to the Western Pacific, including regions such as southern Japan, the Marshall Islands, the Coral Sea, and the Great Barrier Reef. They inhabit coral reefs at depths of 26 to 120 meters (85 to 395 feet), often sheltering in caves or under ledges. Their natural environment is characterized by cooler water temperatures and low light levels, which should be replicated in captivity for their well-being.