Barbonius Anthias saltwater fish care guide

Odontanthias borbonius is one of the more striking deepwater anthias available to the hobby, built on a distinctly high, deep body rather than the slender profile of open-water species. The base color ranges from pale pink to reddish-orange and is broken by irregular tan, yellow, or yellow-brown blotches, with yellowish fins completing the pattern. Adults reach approximately 6 inches. Its range spans the Indo-Pacific, from southern Africa through the western Pacific and north to Japan, where it occupies deep rocky and coral-reef terrain and stays close to caves rather than hovering in the water column.

Adult housing should begin at 100 gallons, with open swimming lanes paired against substantial rockwork. Build in caves, cracks, crevices, and shaded overhangs so the fish always has a secure resting place within easy reach. Because this species comes from depth, start with subdued lighting and raise intensity slowly; even a settled specimen often favors the dimmest corners of a brightly lit reef, so shaded structure matters as much as total volume. Maintain excellent, well-oxygenated water quality in an established system, and fit the aquarium with a tight-fitting lid, as this anthias is capable of jumping.

In the wild, this anthias picks zooplankton from the water near deep reef caves, and captive feeding should follow that carnivorous pattern. Offer a varied menu of small crustaceans and finely chopped meaty foods: mysis shrimp, enriched brine shrimp, krill, shrimp, squid, clam, fish flesh, Cyclops, and copepods all suit its small mouth and grazing habits.

Feed at least twice daily, and give a new arrival several small meals spread across the day. Delivering food close to the fish's chosen shelter is important, since faster or bolder tankmates will otherwise intercept most of it. A specimen that refuses prepared items can often be started on fortified live adult brine shrimp or small live glass or grass shrimp, then transitioned onto frozen and chopped foods once it is eating confidently.

Mysis Shrimp Enriched Brine Shrimp Krill Chopped Squid Chopped Clam Fish Flesh Cyclops Copepods
This is a peaceful, shy, shelter-oriented anthias that spends much of its time near a cave or crevice and frequently emerges most reliably at feeding time. Species-focused accounts describe it as naturally solitary, so keep a single specimen per aquarium rather than attempting a harem or a pair. It may act aggressively toward similar-looking species or when shelter and swimming space are too limited, which is another argument for generous rockwork and volume.

Choose calm tankmates and avoid boisterous, highly competitive feeders that would intimidate it or keep it from reaching food. In the reef aquarium it is considered safe, with no reported harm to stony or soft corals, clams, ornamental shrimp, crabs, or snails, although its natural preference for small crustaceans and zooplankton means it will pick at drifting live food. Mixed-reef systems with mild-mannered fish and plenty of shaded structure suit it best.

FAQ

Frequently Asked Questions

About the Barbonius Anthias

  • How large should the aquarium be for an adult Barbonius Anthias?
    Plan on 100 gallons or more for a single adult. The volume should include open swimming room along with substantial rockwork containing caves and shaded overhangs.
  • Can a Barbonius Anthias be kept in a brightly lit reef aquarium?
    Yes, provided shaded caves and overhangs are available. Introduce bright lighting gradually, since this deepwater species tends to hide at first and may continue favoring darker areas.
  • What should be done if a newly acquired specimen refuses food?
    Offer small meaty foods near its chosen shelter several times daily. Fortified live adult brine shrimp or small live glass or grass shrimp often initiate feeding, and peaceful tankmates reduce competition at mealtime.