Scarlet Hawkfish (Neocirrhites armatus)

Hawkfish don't have a swim bladder, which sounds like a design flaw until you realize what they do with that limitation: instead of swimming freely through the water column, they perch — using their thickened lower pectoral fin rays almost like tiny legs to prop themselves on a rock or coral branch and watch for food to drift by. Neocirrhites armatus, the Scarlet Hawkfish, is easily one of the most vividly colored small fish in the trade, and it spends most of its day doing exactly that from a perch in the rockwork, darting out for a meal and returning to the same spot. The behavior is equal parts endearing and effective.

It's reef safe with corals and generally peaceful toward fish, though it will treat small ornamental shrimp — peppermints, sexy shrimp, cleaner shrimp juveniles — as a snack given the chance. Its native habitat runs across the Hawaiian Islands and the broader tropical Pacific, typically in areas with substantial coral cover and moderate-to-strong current where it can perch in the flow and ambush whatever gets pushed past.

Hardy once established, and one of the more forgiving small reef fish for someone stepping into saltwater for the first time. Feed frozen mysis, brine, and other meaty foods — it's a visual feeder and will take prepared foods readily.

Scientific name: Neocirrhites armatus
Origin: Hawaiian Islands and tropical Pacific — outer reef slopes and coral-rich zones with moderate to strong current
Water parameters: Temp 72–80°F · Salinity 1.020–1.026 · pH 8.1–8.4
Tank requirements: 30 gal minimum; needs open rockwork perches and visual sightlines
Diet: Carnivore — frozen mysis, brine shrimp, other meaty foods; visual feeder that takes prepared foods readily
Compatibility: Reef safe with corals; peaceful with most fish; will eat small ornamental shrimp
Husbandry note: Provide multiple elevated perching spots in the rockwork — a hawkfish without good perch options becomes stressed and reclusive. Flat rock surfaces and branching corals at mid-tank height are ideal.