Opistognathus whitehurstii

Datasheet

General Description

The Dusky Jawfish, scientifically known as Opistognathus whitehurstii, showcases a thickly mottled body in varying shades of dark brown with flecks of black spots. Its caudal fin and part of the dorsal fin boast vibrant yellow hues punctuated by small blackish dots, adding to its striking appearance.

Aquarium Suitability

The Dusky Jawfish is considered suitable for aquariums with a capacity of 30 gallons or more. It thrives in environments that include rocks, small shell fragments, loose coral rubble as part of the aquascape, and a sandy substrate for burrowing. Due to its propensity for jumping, a tight-fitting lid is essential. This species is best kept with peaceful tank mates, and in larger tanks, multiple Dusky Jawfish can coexist by establishing their territories.

Demands, Care, and Hardiness

This species falls under the category of being easy to care for. With a peaceful temperament, the Dusky Jawfish adds charm to aquariums. It requires a carnivorous diet comprising various marine fish, crustacean flesh, and mysis shrimp. Maintaining water conditions with a pH range of 8.1-8.4, a specific gravity of 1.020-1.025, and a carbonate hardness level of 8-12 dKH supports the well-being of these fish.

Reef Suitability

The Dusky Jawfish is considered reef-compatible, making it a versatile addition to a reef aquarium setup.

Aquarium Setup

Creating an ideal habitat for the Dusky Jawfish involves incorporating a variety of elements. A tank of at least 30 gallons with a sandy substrate for burrowing is essential. Including rocks, small shell pieces, and loose coral rubble complements their natural behavior. Optimal lighting conditions consist of moderate levels, and ensuring a secure lid is crucial to prevent any jumping mishaps.

Behaviour

Known for their peaceful demeanor, Dusky Jawfish interact well with docile tank companions. These fish establish territories in larger tanks and exhibit fascinating burrowing behavior.

Feeding and Diet

Feeding the Dusky Jawfish a varied diet of marine fish, crustacean flesh, and mysis shrimp promotes their health and vitality in the aquarium setting.

Dimorphism and Captive Reproduction

If covered, information regarding dimorphism and captive reproduction can provide insights into the unique characteristics and breeding behavior of the Dusky Jawfish.

Habitat and Distribution

The natural habitat of the Dusky Jawfish includes regions where they can burrow in sandy substrates. Understanding their native distribution and habitat preferences sheds light on their adaptation to specific environments.