Bartlett's Anthias (Pseudanthias Bartlettorum)

Also Known As: Bartlett Anthias, Bartlett's Fairy Anthias

Compatibility and Behavior Bartlett's Anthias is a vibrant midwater shoaling fish best known for its bold two-tone look. The back glows in an intense purple-magenta that fades into a bright yellow upper area and tail, with the transition between the two colors really popping under reef lighting. Males typically show deeper coloration, a more extended dorsal fin, and sharper contrast between the pink and yellow sections, while females and juveniles display softer hues. Overall, they create a dynamic, colorful group when they're schooling. This smaller Anthias species is generally peaceful and does best alongside other non-aggressive community fish that occupy different niches in the tank. It's considered reef safe in most aquariums and typically ignores corals, clams, and ornamental invertebrates, though it may act defensively toward other anthias or similarly shaped fish in tight quarters. Kept in a calm, stable environment with plenty of open water, Bartlett's tend to stay active and visible throughout the day, adding constant motion and color to the upper and mid-levels of the reef.

Aquarium Requirements A mature reef of at least 70 gallons is the right starting point for a small group of Bartlett's, with larger volumes always preferred. Plan for ample open swimming space alongside branching rockwork that gives the fish shelter and sleeping spots. Tall structures, caves, and shaded overhangs let the group feel secure enough to school out in the open water while still having a quick retreat when something spooks them. They appreciate moderate, slightly turbulent flow and strong, stable filtration. Like other anthias, they're sensitive to water quality slipping, and with their fast metabolism, they do best with multiple small daily feedings of finely chopped meaty foods, frozen zooplankton, and high-quality micro-pellets that stay suspended long enough to be picked off in the open water. One thing worth knowing: in many cases, Anthias only eat food out of the water column, and once it has fallen to the tank floor they are no longer interested. That makes flow patterns and feeding technique just as important as the food itself. Gentle lighting transitions and a peaceful stocking plan round things out and help keep their color and natural social hierarchy on full display.

Specifications
Approximate Size: Sm: 1-1.5", Md: 1.5-2"
Diet: Planktivore (frequent small feedings of frozen zooplankton, mysis, enriched brine, and micro-pellets)
Origin: Indo-Pacific
Care Level: Moderate to Difficult (best for experienced aquarists due to feeding frequency and stability needs)
Reef Safe: Yes 
Temperament: Peaceful
Minimum Tank Size: 70 gallons
Special Considerations: Requires multiple small daily feedings; sensitive to abrupt lighting changes and aggressive tankmates