Falco Hawkfish

The Falco Hawkfish (Cirrhitichthys falco) is a compact, character-filled saltwater fish with a cream to white body patterned in reddish-brown saddles and spots. Small tufts of cirri along the dorsal fin add to its distinctive appearance, while its habit of resting motionless on rockwork before darting after food gives it the alert, watchful behavior for which hawkfish are known. Its manageable adult size and bold personality make it an appealing choice for many established marine aquariums.

Native to the Indo-Pacific, Cirrhitichthys falco occurs from the Maldives eastward to Samoa and from the Ryukyu Islands south to the Great Barrier Reef and New Caledonia. In nature, it inhabits coral reefs from shallow coastal areas to outer reef slopes, commonly resting around the bases of coral heads and other reef structures.

Reaching approximately 3 inches as an adult, the Falco Hawkfish works well in appropriately stocked fish-only aquariums and can also be kept in a reef aquarium with caution. It generally does not consume corals, but its predatory instincts can make small ornamental shrimp, crustaceans, and exceptionally small fish vulnerable.

Quick Care Guide

Care Level: Easy
Minimum Tank Size: 30 gallons
Temperament: Semi-aggressive
Diet: Carnivore
Reef Safe: With Caution
Region: Indo-Pacific
Scientific Name: Cirrhitichthys falco

Tank Requirements

Provide a well-established aquarium with plenty of secure rockwork, caves, ledges, and elevated resting areas. Falco Hawkfish spend much of their time perched on rocks or coral structures, watching activity around the aquarium before making short bursts through the water column.

Arrange the aquascape to offer several distinct perching locations while retaining open areas for swimming and feeding. A specialized substrate is not necessary, making this species suitable for sand-bottom or bare-bottom systems.

Moderate water movement and good oxygenation are appropriate. A secure lid or aquarium cover is recommended because hawkfish can jump when startled, chased, or introduced to unfamiliar surroundings.

Diet and Feeding

The Falco Hawkfish is a carnivore adapted to feeding on small crustaceans and other animal prey. In captivity, it generally accepts prepared foods readily once acclimated.

Offer a varied diet consisting of mysis shrimp, enriched brine shrimp, finely chopped shrimp, krill, clam, squid, other marine seafood, and quality frozen carnivore blends. Appropriately sized marine pellets can also be incorporated once the fish recognizes them as food.

Feed once or twice daily, offering portions that can be consumed promptly. Because hawkfish often wait on a perch before striking at passing food, make sure particularly aggressive or fast-feeding tankmates do not prevent it from receiving an adequate share.

Temperament and Tankmates

The Falco Hawkfish is semi-aggressive and can become territorial around preferred resting areas. Despite its small adult size, it has a confident personality and is generally best kept with other appropriately sized marine fish that are not excessively timid.

Avoid very small fish that could potentially be viewed as prey. Larger, highly aggressive hawkfish can also intimidate a Falco Hawkfish and are generally poor companions in confined aquariums.

A single specimen is the simplest arrangement for most home aquariums. In the wild, this species may occur alone, in pairs, or in social groups, but combining multiple hawkfish in captivity requires sufficient space, structure, and careful attention to aggression.

Reef Compatibility

Reef Safe: With Caution

The Falco Hawkfish generally does not eat coral tissue and can be kept successfully in many reef aquariums. The primary concern is its predatory behavior toward small mobile animals rather than damage to corals themselves.

Small ornamental shrimp and other small crustaceans may be hunted and eaten. Very small fish can also be at risk, particularly if they are small enough to fit into the hawkfish's mouth. Larger ornamental invertebrates may be less vulnerable, but compatibility cannot be guaranteed.

Like other hawkfish, it frequently rests directly on rockwork, coral branches, and other elevated surfaces. Most established corals tolerate occasional perching, although repeated contact may irritate especially delicate specimens.

Water Parameters

Temperature: 75–80°F
Specific Gravity: 1.024–1.026
pH: 8.1–8.4
Alkalinity: 8–12 dKH

Maintain stable, well-oxygenated seawater with consistent temperature and salinity. Avoid rapid changes in water chemistry, as long-term stability is more important than continually adjusting parameters to achieve an exact number.

Common Considerations

• Reaches approximately 3 inches and requires an aquarium of at least 30 gallons.

• Small ornamental shrimp, crustaceans, and exceptionally small fish may be viewed as prey.

• Provide multiple elevated ledges and secure rock structures for natural perching behavior.

• Can become territorial around favored resting locations, particularly with similar bottom- or rock-oriented fish.

• Generally compatible with corals, but its predatory behavior toward small invertebrates makes it reef safe with caution.