How many Bartlett's Anthias should I keep together?

You should aim for a minimum group of four, structured as one male and at least three females, or simply a group of all females (one will eventually turn male). This harem structure helps distribute the dominant fish's aggression safely.

How often do Bartlett's Anthias need to be fed?

They must be fed 2 to 4 times per day. Because they are highly active planktivores, they burn calories very quickly and will rapidly decline if fed only once daily.

Can I keep two male Bartlett's Anthias in the same tank?

It is generally not recommended unless you have an exceptionally large aquarium (over 800 litres) with massive rockwork. In standard tanks, males will fight relentlessly for dominance, often leading to the death of the weaker male.

Are Bartlett's Anthias reef safe?

Yes, absolutely. They feed entirely on small organisms in the water column and will completely ignore your corals, clams, shrimp, and other ornamental invertebrates.

Why is my Bartlett's Anthias hiding in the rocks?

Newly introduced anthias often hide for a few days as they acclimate. However, prolonged hiding can indicate bullying from tankmates, poor water quality, or weakness from lack of food.

MarineMarineIntermediate

Bartlett's Anthias

Pseudanthias bartlettorum

A vibrant, active, and highly sought-after marine fish known for its striking pink and yellow colouration and fascinating social hierarchy.

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Ideal Conditions

Temperature: 22 – 27 °C
pH range: 8.1 – 8.4
Hardness: 8 – 12 dGH
Salinity: 1.02 – 1.025 SG
Adult size: 8 – 9 cm
250L for a small harem: 250 litres+
Lifespan: 5 – 7 years
Diet: Carnivorous (planktivore); requires frequent feedings of marine meaty foods like mysis, copepods, and high-quality micro-pellets.
Water flow: High
Preferred setup: Reef environment with steep rockwork structures providing plenty of hiding caves, paired with wide open swimming space.

About the Bartlett's Anthias

Bartlett's Anthias (*Pseudanthias bartlettorum*) is an energetic and breathtaking addition to the marine aquarium. Famous for their intense violet-pink bodies contrasted by a vivid yellow back, they bring constant movement to the middle and upper levels of the tank. They are widely considered to be one of the hardier anthias species available to aquarists, provided their high metabolic demands are met. In a properly planned reef environment, a small group creates a stunning visual display.

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Is it right for your tank?

Check Bartlett's Anthias against a habitat you already keep. We compare water type, temperature, pH, adult size, group needs and everything living there.

Where Bartlett's Anthias comes from

Native range

Western Central Pacific

Countries / regions

Marshall Islands, Kiribati, Nauru, Palau, Tonga

Habitat

Steep outer reef slopes and drop-offs swept by strong ocean currents, typically at depths of 4 to 30 metres.

They gather in large numbers along reef faces facing open oceanic currents where plankton is most abundant.

Similar species

Dispar Anthias
Pseudanthias dispar
Lyretail Anthias
Pseudanthias squamipinnis
Ignitus Anthias
Pseudanthias ignitus

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Fairy Wrasses
Cirrhilabrus spp.
Active, peaceful reef fish that occupy similar environments without aggressively competing for the exact same territorial niches.
Great
Yellow Tang
Zebrasoma flavescens
A robust herbivore that will not compete with the anthias for planktonic food and ignores them entirely.
Great
Other Anthias
Pseudanthias spp.
Mixing different anthias species can lead to intense territorial disputes and bullying, especially in tanks under 500 litres.
Compatible with caution
Dwarf Lionfish
Dendrochirus spp.
Predatory species that will likely view slender, resting anthias as a convenient meal.
Not recommended
Seahorses
Hippocampus spp.
Anthias are far too active and aggressive at feeding time, quickly outcompeting slow-moving seahorses for food.
Not recommended

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