
Opistognathus aurifrons
Family: Opistognathidae ยท Jawfish
Also known as: Yellow-Headed Jawfish, Pearly Jawfish
The Yellowhead Jawfish is a uniquely charming species beloved for its fascinating burrowing behavior and endearing personality. This small fish features a pearlescent blue-white body topped with a bright yellow head, creating an attractive color combination that is easily visible as it hovers vertically above its burrow. Its large eyes and expressive face add to its considerable appeal among aquarists.
This species is a dedicated burrow-builder that constructs and maintains an elaborate vertical tunnel in the substrate, reinforced with small pieces of rubble, shell fragments, and coral pieces. It spends much of its time hovering vertically just above the burrow entrance, darting back inside tail-first at the first sign of danger. Watching a Yellowhead Jawfish construct and defend its burrow is one of the most entertaining behaviors in the marine hobby.
The Yellowhead Jawfish requires a deep sand bed of at least four inches, mixed with crushed coral and rubble pieces for burrow construction. It is a mouthbrooder, with males incubating eggs in their mouths for several days until hatching. A tight-fitting lid is absolutely essential, as this species is a prolific jumper, especially when first introduced or startled. Despite this drawback, its personality and behavior make it one of the most rewarding small marine fish to keep.
Yellowhead Jawfish are carnivores and planktivores that feed on small crustaceans and zooplankton in the wild. In captivity, offer frozen mysis shrimp, enriched brine shrimp, finely chopped seafood, and small marine pellets. Feed two to three times daily, targeting food near their burrow opening.
The Yellowhead Jawfish is peaceful and compatible with most community reef fish. It can be intimidated by aggressive species, which may prevent it from leaving its burrow to feed. Best kept with other peaceful species like clownfish, gobies, blennies, and small wrasses. Avoid housing with large predatory fish.
Check CompatibilityYellowhead Jawfish are mouthbrooders. Males incubate fertilized eggs in their mouths for 7-9 days, during which they do not eat. Larvae are released at night and are planktonic. Raising larvae requires rotifers and baby brine shrimp. Captive breeding has been achieved but requires dedicated effort.