
Odontanthias borbonius
Family: Serranidae ยท Anthias
Also known as: Borbonius Anthias, Checked Swallowtail, Yellow-spotted Anthias
The Blotchy Anthias is one of the most coveted deepwater fish in the marine aquarium hobby. Found at depths exceeding 200 feet in the wild, this species inhabits rocky ledges and cave ceilings along steep reef drop-offs throughout the Indo-Pacific. Its striking appearance features a golden-yellow body adorned with irregular reddish-orange blotches and spots, complemented by elongated dorsal fin filaments that give it an unmistakably regal appearance.
In the aquarium, the Blotchy Anthias demands expert-level care due to its deepwater origins. It requires subdued lighting, cooler water temperatures compared to typical reef inhabitants, and exceptional water quality. A large tank of at least 125 gallons is recommended, with plenty of overhangs and cave structures to replicate its natural habitat. This species is shy upon introduction and may take considerable time to acclimate to aquarium life.
Feeding is one of the greatest challenges with this species. In the wild, it feeds on zooplankton carried by deep currents. In captivity, frequent offerings of enriched frozen mysis shrimp, cyclops, and finely chopped seafood are necessary. Multiple small feedings throughout the day are essential, as with all anthias. Due to the extreme collection depth and associated decompression requirements, the Blotchy Anthias commands a very high price in the aquarium trade.
Blotchy Anthias are carnivorous planktivores that feed on zooplankton in the deep water column. In captivity, offer multiple small feedings daily of frozen mysis shrimp, enriched brine shrimp, cyclops, and finely chopped seafood. An automatic feeder can help maintain the frequent feeding schedule this species requires.
Blotchy Anthias are peaceful toward all tankmates. They are best kept with other calm, non-aggressive species that will not outcompete them for food. Avoid housing with boisterous or fast-moving feeders that may intimidate this shy species.
Check CompatibilityBlotchy Anthias have not been bred in captivity. Like other anthias, they are protogynous hermaphrodites, but the extreme care requirements and rarity of this species make captive breeding attempts exceptionally unlikely.