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Bartlett Anthias (Pseudanthias bartlettorum)

Bartlett Anthias

Pseudanthias bartlettorum
Family
Anthias
Care level
Beginner
Temperament
Semi-Aggressive
Reef safe
Reef safe
Max size
8 cm
Min tank
250 L · 66 gal
Origin
Marshal Islands
Diet
Carnivore
Food
Mysis, Enriched brine shrimp, Frozen plankton blends, Small pellets

Overview

The Bartlett Anthias is a small, vividly coloured anthias with a golden-yellow body and a pink-to-purple wash across the head and upper back, making it one of the more striking small anthias for a reef display. It's a naturally social, shoaling species that shows its best colour and behaviour when kept in a small group rather than alone.

Like other anthias it's a constant, fast-metabolism feeder that needs regular meals of small meaty foods throughout the day, doing best in an established, stable tank with good water flow to support its active planktivorous lifestyle.

Its manageable size and generally hardy nature (for an anthias) make it a good option for keepers wanting anthias colour and movement without stepping up to some of the more delicate deepwater species.

Compatibility

Bartlett Anthias are peaceful and reef safe, ignoring corals and invertebrates entirely. They do best in a group of one male with several females, and can be housed with other peaceful reef fish without issue, though boisterous or aggressive tankmates can outcompete them for food.

Multiple males in a small tank may show aggression toward one another, so stocking ratios matter if keeping a group.

Health & quarantine

As with all anthias, this species can decline quickly if underfed or exposed to unstable water conditions, so a mature, well-established tank and consistent feeding schedule are important. A minimum two-to-four-week quarantine with careful feeding monitoring is recommended, and new arrivals should be watched closely to confirm they're eating within the first few days.

Frequently asked questions

Should I keep Bartlett Anthias alone or in groups?
In groups where possible — they're naturally social, shoaling fish and do best with one male and several females rather than as a lone individual.
How often do Bartlett Anthias need to be fed?
Multiple times a day — at least three small feedings is ideal given their fast metabolism.
Is the Bartlett Anthias reef safe?
Yes, fully reef safe with corals and invertebrates.
What happens if the male in a group dies?
A dominant female will typically change sex to become the new male, a behaviour common across anthias species.
What tank size suits a group of Bartlett Anthias?
At least 300 litres to comfortably house a small group with room to establish a peaceful hierarchy.

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.