Flame Hawkfish

Neocirrhites armatus

The bold little red hawk that perches and watches everything — hardy, but it eats small shrimp.

Difficulty: Beginner–IntermediateSemi-aggressive fishReef-safe

The flame hawkfish (Neocirrhites armatus) is a pocket-sized character — a brilliant scarlet fish with no swim bladder that perches on the rocks and corals, propped on its fins, watching the tank like a little hawk. It's hardy, bold and endlessly entertaining. The one caveat is in its diet: it hunts small shrimp and crabs, so it's reef-safe with corals but a threat to a delicate cleanup crew.

Good to know: Reef-safe with corals, but eats small ornamental shrimp and crabs; a jumper — use a lid.

📊 What keepers actually ask: Loved for its personality and perching; the recurring lesson is "it ate my cleaner shrimp" — plan the inverts around it.

Care at a glance

Adult size	~3–4 in.
Minimum tank	A 30+ gallon tank with lots of rockwork and perches.
Temperature	75–82°F (24–28°C).
pH	8.1–8.4.
Specific gravity	1.023–1.026 (reef-standard ≈35 ppt).
Diet	Carnivore — meaty foods (mysis, chopped seafood, pellets); in the tank it also hunts small ornamental shrimp, small crabs and feather-duster worms.
Temperament	Bold and characterful; generally peaceful to similar-sized fish but can be territorial. A jumper. Keep one hawkfish.
Reef-safe	Reef-safe with corals (it doesn't eat coral, though it may perch on and irritate them) — but it eats small shrimp and crabs, so not invert-safe.
Natural range	Pacific.

Beginner-friendly, done right. One of the hardiest, most personable small marine fish — genuinely beginner-easy to keep alive. The catch is compatibility: a flame hawk will hunt and eat small ornamental shrimp (cleaner, peppermint, sexy shrimp), small crabs and feather dusters, so plan your cleanup crew around it (large shrimp like coral banded, fire or pistol usually survive). It doesn't eat corals but may perch on them, and it's a jumper — use a lid. Keep one per tank, and quarantine before adding.

Planning your stock list? Before you buy, run your tank and wish-list through our free stocking & tank-size calculator — it checks this fish's minimum tank and shoal size and flags any aggression clash, so you don't overstock.

The fish store gets these wrong

Common myths, kindly corrected — no shame for having believed them.

"Reef-safe means safe with everything." It's reef-safe with corals, but it's a predator of small shrimp and crabs — not invert-safe. Big shrimp usually survive; small ones don't.
"It needs a swim bladder to rest." It has none — perching on the rocks and corals is completely normal hawkfish behaviour, not a sign of illness.

Before you buy

A cleanup crew that can live with it — large shrimp only (small shrimp/crabs are prey).
A tight lid — hawkfish jump.
Lots of perches and rockwork; one hawkfish per tank.
Quarantine before adding.

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 spots, flashing or rapid breathing — quarantine and treat.
Not perching/hunting as usual, hiding, or not eating — stress or illness.
Clamped fins or cloudy eyes — a water-quality or parasite problem.

Never

Never keep it with small ornamental shrimp or small crabs — it eats them.
Never run an open-topped tank — it jumps.
Never keep two hawkfish in a normal tank (territorial).

Common flame hawkfish questions

Is the flame hawkfish reef-safe?

Reef-safe with corals — it won't eat them (though it may perch on and briefly annoy them). But it's not invert-safe: it hunts small ornamental shrimp (cleaner, peppermint), small crabs and feather-duster worms. Large shrimp like coral banded, fire and pistol shrimp usually live alongside it.

Why does my flame hawkfish sit on the rocks instead of swimming?

That's normal — hawkfish have no swim bladder, so they perch on rocks and corals propped on their pectoral fins, watching for food. It's characteristic behaviour, not a health problem.

Do flame hawkfish jump?

Yes — they're jumpers, so a tight-fitting lid is important. An open top is a common way to lose one.

Can I keep a flame hawkfish with cleaner shrimp?

Risky — it will often hunt and eat cleaner and peppermint shrimp, especially smaller ones. If you want shrimp, choose large ones (coral banded, fire, pistol) and add them, well-established, before the hawkfish.

How big do flame hawkfish get and what tank do they need?

Around 3–4 inches, so a 30-gallon-plus tank with plenty of rockwork to perch on suits them. Keep just one per tank.

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:

Top Shelf Aquatics — Flame Hawkfish Care Guide — reef-safety, shrimp predation, perching
Build Your Aquarium — Hawkfish Care — diet, tank mates, care
reefs.com — Flame Hawkfish — behaviour, care

Written and fact-checked by The Coralkin Team against marine-aquarist and veterinary sources — if your flame hawkfish 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 →

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