Orchid Dottyback
Pseudochromis fridmani
Vivid purple Red Sea jewel, almost always captive-bredBeginner
- Lifespan
- 5-7 years
- Size
- 7cm
- Social needs
- One per tank; territorial with similar shapes
- Time
- 15-20 min daily; reef-standard upkeep
- Cost
- Medium
- Diet
- Carnivore (frozen mysis, enriched brine, pellets)
Overview
What is this animal?
- The orchid dottyback is a head-to-tail royal purple fish endemic to the Red Sea, and one of marine aquaculture's success stories: virtually every fish sold is captive-bred.
- That makes it hardy, parasite-resistant, and pre-adapted to aquarium life.
- Unlike its notoriously mean dottyback cousins, the orchid is comparatively mild-mannered — bold enough to own its patch of rockwork, rarely a genuine bully.
Temperament
- Expect a confident, curious fish that patrols its rock patch and greets the glass at feeding time.
- It holds its own against semi-assertive tankmates far larger than itself.
- Keep one per tank and avoid housing with similarly shaped, similarly coloured fish (other dottybacks, royal grammas) in ordinary systems — the resemblance triggers turf wars.
- With dissimilar peaceful fish it is a model citizen.
A good fit for
- First marine fish alongside clownfish-grade species
- Reef tanks wanting a splash of true purple
- Keepers who value captive-bred livestock
- Mid-sized mixed communities with rockwork
Common mistakes to avoid
- Pairing with royal grammas or other dottybacks
- Open-topped tanks — they jump
- Very timid tankmates being chased off food
- Confusing it with meaner dottyback species
Enclosure
Minimum 100 litres (26 US gallons)
Must be housed alone. One per tank; territorial with similar shapes
- Provide 100 litres (26 gallons) or more with generous rockwork: dottybacks live in and out of crevices, darting along walls and overhangs.
- They are completely reef-safe with corals.
- Standard stable reef parameters suit them: 24-26C, salinity 1.024-1.026, low nitrate.
- A tight lid is non-negotiable — startled dottybacks are accomplished jumpers.
Supplies
Setup
- Tank, stand and sump
- Return pump and powerheads
- Protein skimmer
- Reef lighting
- Rock and sand
- Salt mix, refractometer and test kits
- Quarantine tank
Ongoing
- Frozen mysis shrimp
- Frozen enriched brine shrimp
- Quality small marine pellet
- Frozen chopped seafood blend
- Vitamin or HUFA soaking supplement
- Small thawing cup and strainer
- Turkey baster for target-feeding
Safe substrate: Aragonite sand · Dry or cured live rock · Bare bottom
Care routine
Daily
- Check salinity, temperature and flow
- Check the lid
- Feed
- Head-count and look everyone over
- Top up evaporation with fresh water
Weekly
- Service the skimmer and filter socksevery 3 days
- Check who is being chased
- Clean the glass
- Test the water
Monthly
- Water changeevery 2 weeks
- Calibrate the refractometer
- Check salt, RO/DI and reagents
Less often
- Deep-clean pumps and powerheadsevery 3 months
- Replace RO/DI filter mediaevery 6 months
Vet: Quarterly review with an aggression check — every 3 months
Top resources for more info
Independent creators and organisations we would send a friend to. We have no affiliation with any of them, and nothing here is sponsored. Links checked 2026-09-19.
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Diet
- Feed meaty frozen foods — mysis and enriched brine shrimp — once or twice daily, alongside a quality small marine pellet most captive-bred fish already recognise.
- They feed eagerly from the water column.
- Varied feeding keeps the famous purple saturated; a dottyback on flake alone slowly washes out.
Health
- Captive-bred orchids are among the toughest small marine fish available, with no species-specific weaknesses.
- Standard quarantine remains good practice in any established system.
- Most losses are mechanical: jumping through open lids or vanishing into aggressive tankmates' territories.
- Fix both at setup time.
Is your enclosure big enough?
Is this urgent?
In a reef, stability matters more than any single target number. A parameter moving fast does more damage than a parameter sitting slightly off.
Go now
Today
Quarantine every new animal, including corals and inverts. It is the single practice that separates a reef that lasts from a reef that restarts.
This is general guidance for a healthy adult, not a diagnosis. An exotics vet who knows your animal always overrides it — and the time to find one is before you need one.
What it really costs
Setup, monthly, first year and across a whole life, itemised and with the electricity worked out from the actual wattage. Published figures for the same animal disagree by a factor of four, so the calculator shows ranges rather than picking one.
Bedding and substrate
In a marine system the rock and the sand are life support, and how you start them decides the first six months.
Safe
With a caveat
Never
This is our general list for saltwater fish. We have not built one specific to Dottybacks yet.
My kit says 0.25 ppm. Is that dangerous?
A liquid kit measures total ammonia, but only the un-ionised fraction is really toxic, and that fraction is governed by pH and temperature — each whole pH unit multiplies it roughly tenfold. So the same reading can be nearly harmless in one tank and lethal in another; this works out which one you are in.
Compare with other animals
The same axes for every animal, side by side — the way the guides are written makes that a fair comparison rather than two articles.
Other Saltwater Fish worth knowing
Same axes, same care guides — the honest way to compare them.
Browse all Saltwater Fish →
