Scarlet Hawkfish (Neocirrhites armatus)
The Scarlet Hawkfish, Neocirrhites armatus, is a bold and colourful marine hawkfish, instantly recognised by its rich red body, darker facial markings and alert, watchful behaviour. Also commonly known as the Flame Hawkfish, this species is full of personality and is often seen perching on rockwork, coral branches or ledges while observing everything around it. Hardy, active and visually striking, it can make an excellent feature fish for mature reef or fish-only marine aquariums, provided its predatory instincts around very small tank mates are understood.
Common Name:
Scarlet Hawkfish, Flame Hawkfish, Red Hawkfish.
Scientific Name (Latin):
Neocirrhites armatus
| Size | Adult Length |
|---|---|
| Adult Length | 6 to 8 inches (15 to 20 cm) |
| Water Temperature | 75°F to 82°F (24°C to 28°C) |
| Water pH | 8.1 to 8.4 |
| Water Hardness | 8 to 12 dGH |
| Compatibility | Best suited for mature reef or fish-only tanks; avoid small, slow-moving fish due to predatory nature |
FAQ
What is the typical size of a Scarlet Hawkfish when fully grown?
A Scarlet Hawkfish typically reaches an adult length of 6 to 8 inches (15 to 20 cm).
What kind of tank environment does the Scarlet Hawkfish prefer?
The Scarlet Hawkfish thrives in mature reef or fish-only marine aquariums with ample rockwork, coral branches, or ledges for perching and observation.
Is the Scarlet Hawkfish aggressive toward other fish?
Yes, the Scarlet Hawkfish is predatory and may attack small or slow-moving fish. It is best kept with larger, more active tank mates in a well-established aquarium.

Tim Blake –
The Scarlet Hawkfish is a stunning addition to my reef tank. Its vibrant red color and alert behavior make it a standout. I’ve had it for six months and it’s always perched on the coral, watching everything. Just make sure to avoid small shrimp or gobies.
Amelia McLean –
Beautiful fish with a strong presence. It’s active and curious, often seen scanning the tank. I noticed it didn’t eat small fish, so I removed a few tiny ones. It’s a great visual focal point.
Lucas Dyer –
I bought this for my 120-gallon tank and it’s been thriving. The color is intense and it’s very active. It doesn’t eat much but stays healthy. I appreciate the detailed care notes in the description.