Where to buy Black Cap Jawfish
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Amazon
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Petco
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About Black Cap Jawfish
Opistognathus randalli has a cream to light tan body with a distinctive dark brown or black cap on the head extending to the upper jaw area. The body is elongated and slightly compressed, with the characteristic jawfish morphology and larger-than-normal eyes typical of the genus.
Key facts
- Water Parameters
- Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.02-1.025
- Max Size
- 5
- Feeding Schedule
- 2-3 times daily
- Origin
- Indo-Pacific, primarily from the Philippines and Indonesia to the Great Barrier Reef and Micronesia.
- Family
- Opistognathidae
- Diet
- carnivore
- Difficulty Level
- Moderate - Requires some experience due to specific dietary water or tank requirements. Best suited for intermediate aquarists.
- Care Level
- Moderate
- Temperament
- Semi Aggressive
- Min tank size
- 30 gallons
- Care Requirements
- • 30+ gallon tank minimum with sandy substrate • Temperature 72-78°F, pH 8.1-8.4, stable salinity • Requires burrows/rubble for burrowing behavior • Feed meaty foods (mysis, small crustaceans) 2-3x weekly • Mostly reef-safe but may eat small ornamental shrimp
- Diet Details
- Feed a varied diet of small meaty foods including frozen mysis shrimp, copepods, and small crustaceans. Offer food 2–3 times daily in small portions, as this species naturally feeds on small zooplankton and benthic invertebrates in the wild.
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