Gold-Specs Jawfish
Opistognathus randalli
Also known as Randall's Jawfish, Black Cap Jawfish, Goldspecs Jawfish
Care at a glance
- Temperature
- 73–81°F (23–27°C)
- pH
- 8.1–8.4
- Adult size
- 3.9 in (10 cm)
- Minimum tank
- 30 gal (115 L)
- Temperament
- Peaceful
- Social behavior
- Social
- Swim level
- Bottom
- Difficulty
- Easy
- Breeding
- Hard
- Rarity
- Common
- Reef safe
- Reef safe
- Origin
- Native to the western Pacific, from Indonesia and the Philippines to Micronesia, in sandy rubble areas near reefs.
- Family
- Opistognathidae
Overview
Provide a 115 litre or larger tank with at least 8 cm of mixed sand and rubble and a secure lid, kept at 23 to 27 C and pH 8.1 to 8.4. It is reef safe and peaceful toward other species but territorial to its own kind, so keep one unless you have a pair and a large footprint. Feed small meaty foods such as mysis, enriched brine, and chopped seafood. Keep tiny ornamental shrimp out of reach of its mouth.
In the wild
The gold-specs jawfish builds a burrow in mixed sand and rubble and hovers above it, watching for food and threats. It is pale with a dark cap on the head and a gold ring around the eye. It carries mouthfuls of substrate to shore up the burrow walls. A deep bed of mixed grain sizes lets it dig and line its home.
Good to know
Opistognathus randalli is a western Pacific jawfish in the family Opistognathidae, named after the ichthyologist John Randall. It is a mouthbrooding fish, with the male incubating the eggs in his mouth. It uses shells and coral bits to reinforce the mouth of its burrow.
Did you know
Watching a jawfish rebuild its burrow, carrying one mouthful of gravel at a time, is one of the more entertaining sights in a sand bed tank.
Where to buy
Some links may not be the exact species or variety.
…or ask your local fish store.
Appears in
Saltwater fish · Beginner fish · Reef-safe fish · Beginner saltwater fish
Keeping Gold-Specs Jawfish?
Track water tests, reminders and stocking fit.
Related species

Pearly Jawfish
Opistognathus aurifrons3.9 in (10 cm)29 gal (110 L)73–81°F (23–27°C)Blue-Spotted Jawfish
Opistognathus rosenblatti3.9 in (10 cm)30 gal (115 L)70–77°F (21–25°C)
Twinspot Goby
Signigobius biocellatus3.9 in (10 cm)30 gal (115 L)73–81°F (23–27°C)
Pinkbar Goby
Amblyeleotris aurora4.3 in (11 cm)30 gal (115 L)73–81°F (23–27°C)
Disco Blenny
Meiacanthus smithi3.1 in (8 cm)26 gal (100 L)73–81°F (23–27°C)
Red Sea Mimic Blenny
Ecsenius gravieri3.1 in (8 cm)20 gal (75 L)75–81°F (24–27°C)
