Pacific Jewel Starfish (Nardoa novaecaledoniae)

Pacific Jewel Starfish (Nardoa novaecaledoniae) is an uncommon tropical sea star for an established marine aquarium. Its warm yellow, peach and brown mesh-like trade appearance can be striking, but colour alone is not the reason to choose it. The important questions are whether your aquarium is mature enough to supply broad natural grazing surfaces, stable enough for a salinity-sensitive echinoderm and arranged so you can monitor feeding and body condition over time.

This is a specialist marine invertebrate, not a beginner clean-up-crew animal. The exact wild diet of N. novaecaledoniae is poorly documented, and prepared food acceptance cannot be guaranteed. We therefore describe reef compatibility as conditional rather than promising universal coral and invertebrate safety. One selected quantity supplies one live, unsexed sea star in the current medium trade-size band. The trade band is not a measured arm span, age or adult-size guarantee.

Pacific Jewel Starfish Quick Facts

Accepted scientific name	Nardoa novaecaledoniae (Perrier, 1875)
Other names	Pacific Jewel Starfish; Yellow Mesh Sea Star and Goldtip Starfish also occur as common or trade names
Animal type	Live tropical marine sea star; family Ophidiasteridae
Sale unit	One live, unsexed sea star per selected quantity
Dispatch size	Medium trade band; exact span is not supplied
Care level	Specialist / experienced marine keeper
Starting aquarium	300 litres with at least a 120 cm footprint for one; more mature grazing area is better
Temperature	24-26 C target; avoid rapid or repeated movement
Specific gravity	1.024-1.025 target, measured with a calibrated refractometer
pH	8.1-8.4, stable
Natural setting	Tropical, reef-associated marine habitat; recorded from 0-30 m
Diet status	Exact species diet under-documented; requires mature natural films plus carefully observed supplemental feeding
Reef compatibility	Conditional, not guaranteed; monitor corals, sponges and other invertebrates
Handling	Keep submerged; transfer in a water-filled container
Copper	Do not expose to copper medication

What Is Verified And What Is Not?

Point	Evidence level	How to use it
The species name	Verified	WoRMS and OBIS both accept Nardoa novaecaledoniae as a marine species in the family Ophidiasteridae.
Reef-associated tropical distribution	Supported	SeaLifeBase records a 0-30 m tropical reef association in the Western Central Pacific.
Exact wild diet	Not established in the sources reviewed	Do not buy it as a guaranteed algae eater or clean-up-crew solution.
Universal coral and invertebrate safety	Not proven	Use conditional compatibility and observe interactions with corals, sponges and small invertebrates.
Possible adult span around 25 cm	Aquarium-reference estimate	Provide substantial space and do not treat the medium dispatch label as adult size.
Exact colour and markings	Individual variation	The gallery is a labelled reference, not the exact dispatched animal or a colour guarantee.
Sex	Not supplied	Animals are sold unsexed and sex selection is not offered.

The accepted taxonomy is unusually clear for a trade listing: the World Register of Marine Species lists the name as accepted, and the Ocean Biodiversity Information System returns the same species and family. The husbandry evidence is less complete. Good care therefore means separating established facts from sensible aquarium precautions instead of filling every blank with confident-sounding claims.

What You Receive

One quantity means one live Pacific Jewel Starfish. The current form is described only as medium; no reliable centimetre range is supplied. Natural sea stars vary in overall span, arm proportions, colour intensity and reticulation. The animal may not reproduce every colour or marking visible in a reference image.

The animal is not sexed. The listing does not promise age, maturity, exact arm span, exact collection locality or a particular gold-tip pattern. If an exact appearance or measurement is essential, contact us before ordering and ask whether a current same-batch photograph or measurement is available.

Who This Sea Star Is For

The right keeper already understands marine cycling, evaporation control, salinity measurement and the difference between a mature reef system and a tank that has merely completed an initial ammonia cycle. You should be willing to watch the animal feed, record body condition and respond before slow tissue loss becomes severe. A stable automatic top-off, guarded pumps and a quarantine plan are strongly preferred.

Postpone this purchase if the aquarium is new, salinity changes visibly between top-ups, natural rock surfaces are scarce, copper has been used in the system, or you want an invertebrate that is certain to accept a particular prepared food. It is also unsuitable when a blanket reef-safe guarantee is essential. The welfare plan should work without relying on the starfish to "find something" indefinitely.

Aquarium Size And Mature Grazing Area

Use 300 litres with at least a 120 cm footprint as a conservative starting point for one. This is not a measured biological threshold. It combines an aquarium reference that reports a possible 25 cm span and 75 US gallon recommendation with the practical need for water stability, broad mature rockwork and enough surface area for foraging. A larger, older system is more useful than a tall but sparsely furnished aquarium of the same volume.

"Mature" means more than waiting a set number of weeks. The aquarium should have stable temperature and salinity, fully established biological filtration, zero detectable ammonia and nitrite, and a developed community of natural films on rock. A recently sterilised, aggressively scrubbed or completely dry-rock system may look clean while offering very little for a browsing sea star.

Readiness check	Suitable direction	Reason to wait
System age and stability	Long-term stable readings and predictable maintenance	Recent cycle, unexplained parameter swings or recurring ammonia
Rock surfaces	Established porous rock with varied natural films	Mostly new, sterile or repeatedly scrubbed surfaces
Top-off	Reliable automatic top-off or disciplined measured replacement	Salinity rises and falls between irregular manual top-ups
Observation	Most routes and feeding areas can be inspected	Animal can disappear for weeks inside unsafe or inaccessible rockwork
Medication history	No copper exposure in the intended system	Recent or uncertain copper treatment history

Rockwork, Substrate And Movement Routes

Create stable, rounded rock structures with broad connected surfaces, shaded areas and open routes across the aquarium. Secure loose pieces before arrival; a shifting rock can trap an arm or damage tube feet. Leave enough clearance around glass, pumps and the aquascape for a potentially large sea star to turn without being wedged.

A fine marine sand bed can be used, but this species is not being sold as a sand-sifting Archaster, and no reviewed evidence shows that deep sand is essential. Mature live-rock surfaces are the priority. Avoid sharp artificial decor, exposed metal, fresh cement that has not cured, and abrasive gaps where an arm could be pinched.

Water Parameters And Stability

Temperature	24-26 C target
Specific gravity	1.024-1.025 target; keep daily movement within 0.001
pH	8.1-8.4, stable
Ammonia	0 mg/L
Nitrite	0 mg/L
Nitrate	Low and stable; investigate any sustained rise
Oxygenation	Strong gas exchange without blasting the animal with direct flow
Top-off water	Fresh RO/DI water, added consistently to replace evaporation

Sea stars are osmoconformers and are particularly vulnerable to abrupt salinity change. Measure with a calibrated refractometer rather than judging from salt-mix quantity alone. Evaporation removes water but leaves salt behind, so top off with fresh water, not more salt water. An automatic top-off is one of the most useful protections for this animal.

Do not chase pH, salinity or temperature with repeated rapid corrections. If your source water differs from the target, make planned adjustments to the aquarium before ordering. The water matcher can help organise baseline readings, but marine livestock still requires measured salt-water preparation and species-specific judgement.

Flow, Pumps And Intake Safety

Provide good circulation and oxygen exchange with indirect, varied flow. The animal should be able to cross rock and glass without an arm being repeatedly lifted by a narrow pump jet. Fit guards to wavemakers, overflows and pump intakes before delivery. A sea star can explore equipment after lights out, and exposed moving parts can cause severe injury.

Equipment area	Before arrival	Ongoing check
Wavemakers	Install close-fitting invertebrate guards	Check that guards remain seated and free from damaging suction points
Overflow / weir	Block gaps that admit an arm or the whole animal	Inspect after maintenance and whenever flow changes
Return outlets	Aim for broad indirect movement	Watch whether the animal is repeatedly displaced
Heaters	Use a guarded or safely isolated installation	Confirm temperature with a separate thermometer
Rockwork	Secure all load-bearing pieces	Recheck after cleaning or moving coral mounts

Feeding: What We Know And What We Do Not

The exact natural diet of Nardoa novaecaledoniae is not described in the core taxonomic and distribution sources reviewed for this listing. That uncertainty matters. A related species, Nardoa variolata, has been observed feeding on epibenthic film and coral mucus, but evidence for a congener is not proof of this species' diet.

Use a mature aquarium with extensive natural film as the foundation, then offer small supplemental foods where you can confirm contact and feeding. Aquarium references suggest algae-based food and small pieces of marine flesh or mussel. These are cautious captive-care options, not a guaranteed menu. Some individuals may ignore them, and apparent movement around the tank does not prove adequate nutrition.

Food approach	How to offer it	What to record
Natural mature films	Preserve varied established rock surfaces; avoid sterilising the whole system at once	Where the animal spends time and whether grazing routes change
Small marine-flesh portion	Place a tiny thawed piece of mussel, clam or marine fish close to the oral disc	Firm attachment, stomach contact and whether the food is consumed
Algae-based pellet or wafer fragment	Offer a small softened portion on an accessible surface	Acceptance versus simple contact while moving
Commercial marine-invertebrate food	Use only a clean, appropriately sized portion	Response, waste and effect on water quality
Uneaten food	Remove promptly	Do not leave it to decay or assume it was eaten because it disappeared

Begin with small observed offerings two or three times per week while preserving natural grazing opportunities, then adjust to the individual's response and body condition. Overfeeding can damage water quality; underfeeding may cause slow starvation. There is no responsible fixed schedule that removes the need to observe the animal.

How To Recognise Feeding And Body-Condition Problems

A useful feeding observation is more than the starfish touching food. Watch whether it settles over the portion, maintains firm tube-foot attachment and remains in feeding position long enough to consume it. Photograph the animal from a similar angle every week so changes in arm fullness and the central disc are easier to recognise.

Check	Reassuring direction	Action signal
Arms and central disc	Stable fullness without progressive narrowing	Continuing loss of mass, pinched arm bases or visible shrinkage
Surface tissue	Intact colour and texture	White patches, ulcers, blisters, sloughing or spreading lesions
Tube feet	Firm attachment and coordinated movement	Persistent inability to attach, repeated falling or curled immobile arms
Feeding response	Confirmed contact and consumption over time	All offered foods ignored alongside declining condition
Activity	Regular movement with periods of rest	Sudden prolonged immobility after a parameter change or injury

Test temperature, salinity, ammonia, nitrite, nitrate and pH whenever behaviour changes. Do not wait for an arm to disintegrate before seeking help. Isolate only in a mature, parameter-matched system, and contact an aquatic or exotic veterinarian when tissue damage, loss of attachment or continuing decline is present.

Is The Pacific Jewel Starfish Reef Safe?

Treat compatibility as conditional, not guaranteed. Some aquarium sources apply a broad reef-safety label, but the species-specific feeding evidence is too limited for an absolute promise. A congeneric Nardoa has been observed using coral mucus and epibenthic films, and aquarium reports differ. That makes careful observation more honest than a universal yes.

Watch the animal around fleshy corals, sponges, tunicates, clam mantles and small sessile invertebrates. Briefly crossing a coral is not automatically feeding; repeatedly settling, everting the stomach or leaving damaged tissue deserves investigation. Be prepared to move the starfish to a mature alternative system if a harmful pattern is confirmed.

Do not buy it as a reliable algae remover, pest-star controller or replacement for normal aquarium maintenance. Even when it consumes films or small organisms, its ecological effect in one aquarium cannot be guaranteed.

Fish And Invertebrate Compatibility

Compatibility group	Guidance	Why
Peaceful reef fish that ignore invertebrates	Often the lower-risk direction	Still observe each fish; species labels do not predict every individual.
Triggerfish, puffers and large predatory wrasses	Avoid	They may bite arms, tube feet or the central disc.
Harlequin shrimp	Avoid	Sea stars are their specialised prey.
Large or opportunistic crabs	Avoid or assess very cautiously	Claws can damage soft tissue and tube feet.
Other large sea stars	Only in a substantially larger, mature system	Natural-food competition can be difficult to measure.
Corals and sessile invertebrates	Conditional	Exact diet and individual behaviour are not predictable enough for a blanket guarantee.

Compare body plan and husbandry rather than treating every star-shaped animal as interchangeable. Our Blue Starfish and Red/Orange Linckia are true sea-star comparisons, but neither is an automatic companion. Archaster typicus is a sand-associated comparison with different foraging needs. Ophiolepis superba and the Green Brittle Star are brittle stars with different anatomy and behaviour, not substitutes for this care sheet.

Handling, Air Exposure And Copper

Keep the sea star submerged during transfer. Sea stars exchange gases across delicate body structures and tube feet; lifting into air can cause avoidable stress and damage. Move the animal in a water-filled rigid container or submerged bag rather than using a dry net or holding an arm. Never pull an attached animal from glass or rock. Allow it to release, or gently encourage tube feet one area at a time while submerged.

Do not use copper medication in the display, acclimation container or any shared water system. Copper is highly toxic to many marine invertebrates. If fish require copper treatment, use a separate hospital system with dedicated equipment. Do not use household cleaners, soap or unverified dips on the starfish, and never dose medication by copying a fish protocol.

Arrival And Salinity-Safe Acclimation

1. Prepare the mature, guarded aquarium before delivery and read the current live-animal delivery guidance.
2. Be present for arrival. Inspect the unopened transport container immediately and record any concern before changing it.
3. Keep lighting low and compare transport temperature and salinity with the prepared aquarium using clean equipment.
4. Follow the supplied instructions to match temperature and specific gravity gradually in a separate, aerated container. Larger salinity differences require more careful adjustment.
5. Do not leave an opened shipping bag in a long, unattended drip. Water chemistry changes after opening, so use active observation rather than a fixed timer.
6. Transfer the animal while submerged in a water-filled container. Do not expose it to air and do not pour transport water into the display.
7. Place it on a stable, accessible rock surface away from pump suction and direct flow. Keep lights subdued while it attaches.
8. Recheck salinity, temperature and attachment. Offer only a small observed food portion after the animal has settled and water readings remain correct.

Specific-gravity stability after arrival matters as much as the initial acclimation. Mark the sump operating level, confirm automatic top-off function and check the refractometer against calibration fluid. A careful first hour cannot compensate for repeated evaporation swings during the following week.

Quarantine And Observation

Quarantine is useful only when the separate system is mature, fully marine and parameter matched. A bare, newly cycled container with unstable salinity may be more dangerous than a prepared display. Use dedicated tools and inspect for tissue damage, unusual hitchhikers, weak attachment and feeding response.

Do not share acclimation water between systems. Observe attachment, movement and body condition daily, but avoid repeated handling. If isolation is needed after a problem appears, match salinity and temperature before transfer and keep the animal submerged throughout.

Existing Gallery Image And Natural Variation

The current gallery contains a reference image made to illustrate the researched yellow-peach reticulated trade appearance. It is not a source photograph, not a diagnostic identification image and not the exact animal that will be dispatched.

Use the image to understand the general visual theme only. Natural colour, arm shape, mesh pattern and size can differ. Ask for a current photograph before ordering if individual appearance is decisive.

Why This Listing Does Not Promise Easy Care

The old content made the husbandry sound routine and suggested that a generic smaller marine setup would be enough. Those statements hid the two most important risks: uncertain nutrition and sensitivity to unstable seawater. A sea star can move around for a long time while progressively losing condition, so apparent activity is not proof that care is successful.

A stronger listing gives you the reason to say no. Choose a different animal if you cannot provide an older system, stable top-off, broad grazing area, guarded pumps, conditional coral compatibility and active feeding records. Good search visibility should help the right keeper make a sound decision, not turn uncertainty into sales language.

Delivery, Guarantee And Welcome Offer

Current availability is shown on the page and confirmed at checkout. Eligible livestock orders are covered by the current Live Arrival Guarantee terms. Read the delivery page before dispatch, be available for the courier and follow the stated arrival-inspection and evidence steps immediately if there is a problem.

The active code WELCOME10 currently provides 10% off where checkout eligibility and current offer terms allow. Code eligibility is confirmed at checkout. The aquarium-readiness decision should be completed before the offer is used.

Evidence And Further Reading

• World Register of Marine Species: accepted taxonomy for Nardoa novaecaledoniae
• Ocean Biodiversity Information System: accepted marine taxon record
• SeaLifeBase: tropical reef association, range and depth record
• Nigam and Raghunathan: taxonomic record from the Andaman and Nicobar Islands
• Peer-reviewed congeneric feeding study: evidence boundary for Nardoa variolata
• Veterinary sea-star care: mature systems, salinity stability and water quality
• UF/IFAS: why sea stars should remain in water
• UF/IFAS Extension: copper use and invertebrate sensitivity in marine aquaria

Care-data note: taxonomy and natural distribution are species-specific. Aquarium minimum, prepared-food options and compatibility cautions are conservative husbandry guidance because the exact diet and captive tolerance of this species are incompletely documented. Monitor the individual and seek qualified aquatic-veterinary advice when condition declines.