A brilliant solid-purple dottyback from the Red Sea, hardy, reef-safe and far more peaceful than most of its relatives. Captive-bred specimens are widely available, making it a great, colorful choice for small reef tanks.
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Small, colorful cave- and ledge-dwelling marine fish popular as hardy reef and nano centerpieces, including the dottybacks (Pseudochromidae) and the longfin basslets and assessors (Plesiopidae). Most are reef-safe, secretive, and prone to jumping, so a covered, rock-rich tank suits them best.
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
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Minimum
Nano reef with caves
30 gal / 110 L reef
Pseudochromis fridmani is one of the more peaceful dottybacks — captive-bred is far less aggressive than wild. Cave-rich reef, peaceful tankmates, secure lid.
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Recommended
Reef with rocky territory
55 gal / 200 L+
More territory reduces nipping at smaller fish (especially shrimp). Pairs are reef-safe and reasonably bold once settled.
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Ideal
Mature mixed reef
75 gal+ / 280 L+ mixed reef
Larger reef with abundant rock seams, copepod-rich refugium, and selected peaceful tankmates. Pair often breeds — a satisfying captive-spawn target.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
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Egg
Fish eggs are small, translucent spheres, often laid in clutches on plants, substrate, or in a nest — or carried/brooded by a parent in livebearing and mouth-brooding species. A dark eye spot and the curled embryo become visible inside as development progresses.
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Fry
Newly hatched fry are tiny and semi-transparent, frequently still carrying a yolk sac that fuels them before they feed freely. They lack full fin structure and adult coloration, staying near cover until they can swim and forage on their own.
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Juvenile
Juveniles look like miniature adults but with developing fins and muted or different markings; many species shift pattern and color as they mature. Growth is rapid at this stage given clean water and steady feeding.
Adult
Adults show the species' full size, finnage, and mature coloration, and are sexually mature. Many fish develop sex-specific differences in size, color, or fin shape, which can intensify during breeding.
Habitat & enclosure
Keep singly (or a bonded pair) in a reef tank of at least 115 L (30 gal) with abundant live rock and crevices. Maintain 24-27 C (75-81 F), pH 8.1-8.4, salinity 1.023-1.025 SG, dKH 8-12. Moderate flow and standard reef lighting suit it; rockwork with caves is essential, as it darts in and out of holes and defends a small territory.
Substrate
Fine sand with plenty of live rock arranged into caves and crevices, which it uses as a home base and refuge.
Equipment & setup
Standard reef filtration with a protein skimmer, a heater and moderate powerhead flow. Reef LED lighting is sufficient; no special equipment is required.
Diet
Carnivore feeding on zooplankton and small crustaceans in the wild. In the aquarium it readily accepts frozen mysis, enriched brine, finely chopped seafood and quality marine pellets; feed once or twice daily. Easy to feed and not picky.
Behavior & temperament
Reef-safe and relatively peaceful for a dottyback, though it is territorial around its chosen cave and may chase smaller, similarly shaped fish. It can help control bristleworms and tiny pests. Keep one per tank unless adding a mated pair, and add it later in the stocking order so it does not dominate timid newcomers.
Health
Hardy and disease-resistant, especially captive-bred stock; still quarantine for marine ich and velvet. Stable water quality and a varied diet keep it in top condition. Few species-specific health issues.
Tips, DIY & hacks
Choose captive-bred fish (pioneered by ORA) for hardiness and to relieve pressure on Red Sea reefs. It is reportedly an effective natural predator of bristleworms and can pick at small pests. Add it after more timid fish, drip-acclimate, and quarantine before introduction.
