Dusky Jawfish

Opistognathus whitehurstii

(1 Reviews)

Dusky Jawfish

Dusky Jawfish

Opistognathus whitehurstii

(1 Reviews)

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Care Facts

Care Level: Easy
Temperament: Peaceful
Diet: Carnivore
Reef Safe: Yes
Minimum Tank Size: 30 gallons
Max Size: 4 inches

The Dusky Jawfish has a body that is thickly mottled with shades of dark brown and flecked with blackish spots. It is very active fish and is constantly looking for material to build up its home. The Dusky Jawfish is an amusing fish that spends all day poking its head out of its burrow and opening its wide mouth at any passing fish in an attempt to keep them away. It reaches up to 4 inches in length, is passive in nature and moderately hardy in stamina. The Dusky Jawfish needs to have a thick sand bed in the tank, since it mostly hangs out and  loves to dig tunnels. It is mostly found to be active during daytime and less at night. The Dusky Jawfish does well in groups, but can also live alone. Since there is no distinguishing feature to differentiate males from females, breeding this species is hard in captivity.   

The Dusky Jawfish (Opistognathus whitehurstii) - A Striking Marvel for Your Marine Aquarium

Embark on a journey into the captivating world of the Dusky Jawfish with this informative and formal product description. Learn essential aspects of keeping this unique species in saltwater marine aquariums, covering habitat, reef safety, size, lifespan, diet, compatibility, and more.

Habitat of the Dusky Jawfish:

Native to the Western Atlantic, the Dusky Jawfish is commonly found in the Caribbean Sea and the Gulf of Mexico. It favors sandy substrates and rocky crevices in coral reefs, creating burrows as its shelter. Replicating this habitat is crucial for their well-being in aquariums.

Is the Dusky Jawfish Reef Safe?

Indeed, this species is considered reef-safe, posing no threat to corals or other invertebrates. However, caution is advised with corals that have extended sweeper tentacles to avoid potential conflicts.

Size and Lifespan of the Dusky Jawfish:

With adults reaching an average size of 4 to 6 inches, the Dusky Jawfish is relatively small. In captivity, they can live up to 5 years or more with proper care.

Diet of the Dusky Jawfish in Captivity:

As carnivores, these jawfish primarily feed on small crustaceans and zooplankton in the wild. In captivity, they readily accept a high-quality frozen or live diet, including brine shrimp, mysis shrimp, and other marine protein sources.

Aquaculture and Availability of the Dusky Jawfish:

While not extensively aquacultured, Dusky Jawfish are available through reputable marine aquarium suppliers. Saltwaterfish.com, a leading online retailer, consistently offers healthy and vibrant Dusky Jawfish to hobbyists.

Compatibility with Other Fish and Invertebrates:

Generally peaceful, the Dusky Jawfish can be territorial around its burrow. Compatible tank mates include other peaceful species such as clownfish, gobies, and blennies. Avoid aggressive or larger fish that may intimidate or outcompete them for resources.

Sexual Dimorphism of the Dusky Jawfish:

Sexual dimorphism is not easily distinguishable, as males and females share similar external characteristics.

Juvenile to Adult Coloration Changes in the Dusky Jawfish:

Juveniles display vibrant coloration with distinctive markings that may fade as they mature into adulthood. Adult coloration is characterized by shades of brown, providing effective camouflage against sandy substrates.

Temperament of the Dusky Jawfish:

Known for their curious and engaging behaviors, these jawfish are generally peaceful. They can be territorial around their burrows, especially during breeding.

Tank Requirements for the Dusky Jawfish:

Ensure optimal tank conditions with a minimum aquarium size of 30 gallons, a sandy substrate for burrow construction, and stable water parameters. Maintain a temperature between 74°F and 78°F, pH between 8.1 to 8.4, and salinity around 1.023 to 1.025. Moderate water flow is ideal.

Other Common Names for the Dusky Jawfish:

Known by other common names such as Black Cap Jawfish and Whitehurst's Jawfish.

Five Compatible Tank Mates for the Dusky Jawfish:

Why Choose Dusky Jawfish from Saltwaterfish.com?

Saltwaterfish.com is a reputable online retailer committed to providing healthy and ethically sourced marine life. When you purchase the Dusky Jawfish from Saltwaterfish.com, you can be confident in the quality and well-being of your new aquatic addition. Their stringent quality control measures ensure you receive a vibrant and thriving Dusky Jawfish for your saltwater aquarium.

In conclusion, the Dusky Jawfish is a captivating species that brings unique behaviors and aesthetics to saltwater aquariums. By adhering to proper care guidelines and obtaining this species from a reliable source like Saltwaterfish.com, hobbyists can enjoy the presence of these intriguing jawfish in their marine setups.

I had never purchased fish for my aquarium online before and I was thrilled when the Dusky Jawfish arrived and very healthy.

Reviewed by: Susan Miller on Sept. 12, 2021

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