Percula ClownfishThe true percula (Amphiprion percula) is the ocellaris's near-twin — the same hardy, captive-bred, beginner-friendly clownfish, with bolder black outlines and a slightly bossier streak. Care is essentially identical: a stable ~20-gallon tank, standard reef water, an omnivore diet, fully reef-safe, and no anemone required. Buy captive-bred and you've got a decade-plus fish.
Care at a glance
| Adult size | About 3 in (7–8 cm), occasionally to ~4 in (10 cm). Females larger. |
|---|---|
| Lifespan | A long-term fish — 10+ years, essentially the same as its near-twin, the ocellaris. |
| Minimum tank | ~15–20 gallons for one or a bonded pair; 30+ for a reef (BRS lists 15 gal). Stable water matters more than a big number. |
| Temperature | 75–82°F (24–28°C). |
| pH | 8.1–8.4. |
| Specific gravity | 1.020–1.025. |
| Other targets | Nitrate under ~20 ppm; steady salinity beats a perfect one-off reading. |
| Diet | Omnivore — a quality marine pellet or flake, plus frozen mysis and brine shrimp; small amounts 2–3 times a day. |
| Temperament | Hardy and generally peaceful — a touch bolder and more territorial than the ocellaris, especially around a chosen host. |
| Reef-safe | Yes — safe with soft, LPS and SPS corals and with inverts. |
The fish store gets these wrong
Common myths, kindly corrected — no shame for having believed them.
- “Percula need an anemone.” They don't — captive-bred percula thrive with no anemone, exactly like ocellaris.
- “Percula and ocellaris are the same fish.” Very close, but not identical — the true percula (Amphiprion percula) has bolder black outlines and can be a bit bossier. Care is the same.
- “Any two will pair.” Two small captive-bred juveniles usually pair (the larger becomes female); adding a second adult later often ends in aggression.
Before you buy
- Buy captive-bred — hardier, already eating prepared food, and no wild-reef impact.
- Cycle the tank first; a clownfish isn't a “cycling fish.”
- Decide one or a young pair up front.
- Skip the anemone at the start.
Quarantine and get help if…
We can't diagnose from a photo — but these are the signs to stop watching, quarantine, and get an aquatic vet or an experienced reefer's eyes on it:
- White salt-grain spots, flashing/scratching, or rapid gill-breathing (possible ich or velvet — velvet moves fast).
- A cloudy film or patches on the skin, clamped fins, or gasping at the surface.
- Refusing food for more than a day or two, or a hollow, sunken belly.
- Any new fish added without quarantine — the most common way disease enters a tank.
Never
- Never add a clownfish to an uncycled tank.
- Never use copper-based medications in a reef tank or around inverts.
- Never assume an anemone is required.
- Never put two adult clownfish (or two clownfish species) together hoping they'll pair.
Common percula clownfish questions
Is the percula clownfish different from the ocellaris?
Yes, slightly. The true percula (Amphiprion percula) has bolder black outlines between its bars, often more black overall, and can be a touch more territorial. Day-to-day care — tank size, water, food — is essentially identical.
Do percula clownfish need an anemone?
No. Captive-bred percula live full, healthy lives with no anemone; they'll host a coral, a powerhead, or nothing.
What size tank does a percula clownfish need?
About 20 gallons for one or a bonded pair; 15 gallons is a workable minimum and 30+ gives room to grow into a reef.
Are percula clownfish reef-safe?
Yes — safe with soft, LPS and SPS corals and inverts.
How long do percula clownfish live?
A long time — 10+ years is normal with stable care, the same as the closely-related ocellaris.
Sources & further reading
This guide was written and fact-checked against these authorities. It's honest, general guidance — not a diagnosis, and not a substitute for an aquatic vet or your own test kit:
- Bulk Reef Supply — How To Care For Percula Clownfish — tank size, temperature, pH, salinity, diet, temperament, reef-safe
- LiveAquaria — True Percula Clownfish — appearance, adult size, captive-bred
Written and fact-checked by The Coralkin Team against marine-aquarist and veterinary sources — if your percula clownfish shows a red-flag sign above, quarantine and get an aquatic vet or an experienced reefer's eyes on it. We never guess a care number.
🔬 Review status: team-written and fact-checked against cited sources · not yet reviewed by a marine vet. How we research & fact-check →