Chinstrap Jawfish

The Chinstrap Jawfish (Opistognathus sp.) is a small jawfish often listed in the trade as Opistognathus sp. 6, an as-yet undescribed species. It shows coarse white “snowflake” mottling over a darker base color, plus an eye-to-chin band and a noticeable eyespot near the front of the dorsal fin.

What You’ll Observe:

• Carrying small bits of shell or rubble to build and maintain its burrow entrance
• Spending long stretches stationed in its home, then making quick dashes out into the water column
• Reworking the sandbed around its chosen spot as it “remodels” the burrow
• Defending its immediate burrow area with brief displays when a neighbor drifts too close

Provide a sandbed with a deeper area and include small rubble/shell pieces so your jawfish can reinforce its burrow naturally. Offer small meaty foods (like mysis and finely chopped marine fare) in portions that drift past its home area so it can grab food and retreat smoothly.

Is it normal for a jawfish to “vanish” for days after going into the tank?
Yes—many will stay committed to the burrow zone and show themselves most consistently around feeding time once they settle in.

Will it seal the burrow or block the entrance on purpose?
That’s common behavior; they often move sand and rubble to close up, then reopen when they’re ready to resume normal activity.

Does a Chinstrap Jawfish always hover out in the open like some other jawfish species?
Not always—some individuals spend more time inside the burrow with quick outings rather than extended hovering in the water column.

Can it share the same sand space with other bottom-dwellers?
It does best when it can claim its own “burrow radius,” with neighboring sand fish given separate perching/burrow areas in the layout.

Do I still need a tight-fitting lid once it’s established?
Most keepers treat jawfish as committed jumpers long-term, so a snug cover that closes small gaps is part of normal day-to-day success.

Our selection process means you get robust, well-adjusted specimens that settle in quickly.