The longnose hawkfish wears a red-on-white crosshatch and a needle snout, and lives like its namesake: perched high on the reef, watching, then striking.
In the wild it sits in gorgonians and black corals at depth.
It is hardy, disease-resistant, and full of character — one of the most rewarding 'personality fish' in the hobby, with stocking caveats that need respecting.
Housing
Provide 150 litres (40 gallons) or more with tall rockwork, branching structures, or gorgonian-like decor for perching; a hawkfish without lookout posts is a stressed hawkfish.
It rests on its pectoral fins rather than swimming constantly.
It is coral-safe and fine in reefs at standard parameters: 24-26C, salinity 1.024-1.026.
The lid must be tight — hawkfish are explosive jumpers when startled.
Diet
Feed meaty foods once or twice daily: frozen mysis, krill, enriched brine, and chopped seafood, with marine carnivore pellets accepted in time.
The strike from a perch is fast and accurate.
Vary the menu; a hawkfish on one food sulks and fades.
They are unfussy eaters once settled, usually within days.
Health
Longnose hawkfish are among the tougher marine fish: thick-skinned, parasite-resistant, and unbothered by minor parameter wobbles that stress delicate species.
Quarantine remains best practice.
Most losses are jumping accidents or starvation in shipping-stressed new arrivals — confirm feeding at purchase.
Otherwise expect a long, robust aquarium life.
Temperament
It is peaceful with fish too large to swallow but a genuine predator of small, slender fish and ornamental shrimp: firefish, small gobies, and cleaner shrimp are at real risk.
Stock around its mouth, not its manners.
Keep one hawkfish per tank; two will fight for the high perch.
With suitable tankmates it is bold, watchful, and quickly learns to anticipate feeding — often hopping perch to perch to track its keeper across the room.
A good fit for
Keepers who want an interactive character fish
Reefs with tall rockwork and branching decor
Communities of mid-sized, robust fish
Aquarists tired of delicate marine species
Common mistakes to avoid
Ornamental shrimp — they will be eaten
Tiny slender fish disappearing one by one
Open lids: hawkfish jump far and fast
Pairing two hawkfish over one prime perch
Is your enclosure big enough?
Minimum volume150 litres (40 US gallons)
CompanyMust be housed alone. One hawkfish per tank
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
Any detectable ammonia or nitriteWater change now with matched, mixed and aerated saltwater. Stop feeding. Directly toxic, and a marine system has less margin than a freshwater one.
Now
Temperature or salinity has moved sharplyCorrect slowly, over hours, not minutes. Check the heater and the top-off. The speed of the change does the damage. Correcting fast repeats the injury in the other direction.
Now
Rapid gilling, or a fish hanging in the flow breathing hardIncrease aeration and check temperature and salinity. Warm water holds less oxygen, and a heater failure shows up here first.
Now
Today
White spots, or a fine dusting like icing sugarIdentify which parasite before treating. Most reef tanks cannot be treated in place. The two common parasites look similar and need different handling; velvet can kill a tank in days.
Today
Corals closed for more than a day, or receding tissueTest alkalinity first, and compare it against the last reading rather than a target. Unstable alkalinity is the most commonly cited coral killer, and a swing shows up in the trend, never in a single point.
Today
A new fish added without quarantine now looks unwellRemove it to a separate system today if you can. Nearly every wipeout in a reef tank traces back to a skipped quarantine.
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.
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate