Description

Bartlett’s Anthias (Pseudanthias bartlettorum)
Vibrant, active, and often the star of a reef tank.

Description:

Bartlett’s Anthias are small, colorful reef fish native to the central Pacific, especially around the Marshall Islands. Males display bright magenta-pink bodies with yellow backs and tails, while females and juveniles are more muted but still striking. Their elongated dorsal fin and constant movement add liveliness to reef tanks.

• Size: Up to 3.5 inches

• Coloration: Pinkish-purple body with yellow dorsal area and tail

• Lifespan: 5–7 years with proper care

• Temperament: Peaceful but active; can be semi-aggressive among their own kind or when establishing hierarchy

Care Requirements:

Tank Size:

• Minimum 55 gallons for a small group (1 male with 3–5 females preferred)

Diet:

• Carnivorous; feed 2–3 times daily

• Diet should include: mysis shrimp, brine shrimp, finely chopped seafood, and high-quality frozen or pellet foods

• Thrive with a varied diet rich in protein

Behavior:

• Schooling fish; best kept in harems (one male to multiple females)

• Can become aggressive toward conspecifics if not enough space

• Males may chase females to maintain dominance

Reef Compatibility:

• Fully reef-safe

• Will not harm corals or invertebrates

Water Parameters:

• Temperature: 74–80°F

• pH: 8.1–8.4

• Salinity: 1.023–1.025

• Ammonia/Nitrite: 0 ppm

• Nitrate: <10 ppm ideal

Aquascape Tips:

• Open swimming space is important

• Provide rock caves or ledges for hiding and sleeping

• Strong flow and high oxygenation are appreciated

Special Notes:

• Bartlett’s Anthias are protogynous hermaphrodites: dominant females can transition to male

• Keeping them well-fed and reducing stress is key to long-term health

• Avoid housing with overly aggressive tankmates