Gold-specs jawfish

Opistognathus randalli

Also known as Randall's Jawfish, Black Cap Jawfish, Goldspecs Jawfish

SaltwaterFish

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
Family
Opistognathidae
Origin
Native to the western Pacific, from Indonesia and the Philippines to Micronesia, in sandy rubble areas near reefs.

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.

Weekly picks

Tank mates

Gold-specs jawfish is a peaceful, social species that keeps to the bottom. These picks share a community profile with it, are safe together in both directions, and overlap on water type, temperature and pH.

Check the full mix in the stocking calculator

Common questions

What size tank does a Gold-specs jawfish need?

A Gold-specs jawfish needs at least 30 gal (115 L). It spends most of its time in the bottom.

What temperature and pH does a Gold-specs jawfish need?

A Gold-specs jawfish is comfortable at 73–81°F (23–27°C) with a pH of 8.1–8.4.

How big does a Gold-specs jawfish get?

An adult Gold-specs jawfish reaches about 3.9 in (10 cm).

Related species