Geometric Pygmy Hawkfish (Plectranthias inermis)

The Geometric Pygmy Hawkfish is a small and vibrantly colored fish, featuring a geometric pattern of red, white, and brown markings across its body. Despite its name, it is not a true hawkfish but is more closely related to anthias. This fish is known for its unique behavior of perching on rocks and corals, similar to hawkfish, making it an intriguing addition to reef aquariums. Its compact size and stunning patterning make it especially popular for nano tanks and peaceful reef setups.

Care Information

• Maximum Size: Up to 2.5 inches.
• Tank Size: 20 gallons minimum; this small fish is ideal for nano tanks or larger tanks with plenty of live rock for hiding and perching.
• Diet: Carnivorous; feeds on small meaty foods such as mysis shrimp, brine shrimp, and finely chopped seafood. It requires a varied diet and regular feedings to maintain health and vibrant coloration.
• Water Temp: 74-80°F.
• Salinity: 1.020-1.025.
• Aggression: Peaceful; best kept with other peaceful species in a reef or community tank. Avoid housing with aggressive or large fish that may outcompete it for food or space.
• Skill Level: Advanced; the Geometric Pygmy Hawkfish can be difficult to keep due to its specific feeding requirements. It often struggles to adapt to prepared foods in captivity and may require live or frozen meaty foods. Multiple daily feedings of nutrient-rich foods are essential for keeping this species healthy.
• Reef Compatibility: Reef-safe; does not harm corals or invertebrates, and its small size and peaceful nature make it a great addition to reef tanks.

Special Feature - Perching Behavior
Similar to true hawkfish, the Geometric Pygmy Hawkfish enjoys perching on rocks and coral branches, watching its surroundings before darting out to capture food. Its calm demeanor and unique behavior add extra personality to any tank.

Feeding Difficulty
This species can be challenging to feed in captivity, especially when first introduced. It may take time for the fish to accept frozen or prepared foods, and some individuals may require live foods such as live brine shrimp or copepods. Consistent and varied feeding is crucial for its success in a home aquarium.

Coloration

• Indo-Pacific Region: The Geometric Pygmy Hawkfish is adorned with a striking geometric pattern of red, white, and brown, making it a visually stunning fish in smaller tanks. Its colors and patterns stand out beautifully against live rock and coral​.

Typical Habitat

• Distribution: Native to the Indo-Pacific region, this species inhabits coral reefs and rocky crevices, where it perches and hunts for small prey. It prefers environments with plenty of hiding spots and will thrive in well-established reef tanks.