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Blotched Anthias (Odontanthias borbonius)

Blotched Anthias

Odontanthias borbonius
Family
Anthias
Care level
Intermediate
Temperament
Peaceful
Reef safe
Reef safe
Max size
15 cm
Min tank
300 L · 79 gal
Origin
Indian Ocean (Reunion, Mauritius)
Diet
Carnivore
Food
Mysis, Enriched brine shrimp, Frozen plankton blends, Small pellets

Overview

The Blotched Anthias is a deepwater anthias species with a striking pink-and-red body marked by irregular pale blotching, quite different in appearance from the more commonly seen shallow-reef anthias species. Because it's collected from significantly deeper water than typical anthias, it faces greater decompression-related stress during collection and shipping, making sourcing and initial acclimation particularly important.

It shares the general planktivorous feeding habits of the anthias group but tends to be a little more reclusive and slower to settle than shallow-water species, often taking longer to feel secure and start feeding confidently in a new tank.

Given its deepwater origin, it does best in a stable, mature tank with subdued lighting and plenty of structure to retreat to, rather than a brightly lit, heavily trafficked display.

Compatibility

Blotched Anthias are peaceful and reef safe, ignoring corals and invertebrates entirely. They can be kept singly or, where budget and sourcing allow, in a small group, though this species is less consistently available as a confirmed group than more common anthias.

Avoid pairing with boisterous or fast-feeding tankmates that could outcompete this more retiring species for food.

Health & quarantine

This species carries elevated risk due to its deepwater collection origin, and buyers should specifically ask suppliers about decompression handling and the fish's feeding status before purchase. A minimum four-week quarantine with careful feeding monitoring is strongly recommended, and new arrivals should be watched closely in the first week to confirm they are eating.

Frequently asked questions

Why is the Blotched Anthias considered advanced?
It's a deepwater species that experiences more stress during collection and shipping than typical anthias, and can be slower to settle and feed confidently.
What should I ask before buying a Blotched Anthias?
Confirm the supplier's decompression handling process and that the specific fish is already eating well.
Is the Blotched Anthias reef safe?
Yes, fully reef safe with corals and invertebrates.
How often should I feed a Blotched Anthias?
Multiple small feedings a day, given its fast metabolism and planktivorous feeding habits.
What tank conditions suit a Blotched Anthias?
A stable, mature tank with subdued lighting and plenty of structure to retreat to works best given its deepwater origin.

Care guidance is drawn from our own experience — every fish is an individual, so treat it as a starting point, not a guarantee. Not sure if a species suits your tank? Come ask us in store. New to the terms? Read the care-terms glossary.