Saltwater Fish
Diamond Watchman Goby — What's a Fair Price?
Based on 2 in-stock listings across 1 online reef vendor, updated September 5, 2026.
A typical Diamond Watchman Goby sells for around $34.49 right now. Anything near $32.99 is at the cheap end of today's market. Prices below are the cheapest current listing per vendor.
Cheapest per vendor
| Vendor | Listing | Price | |
|---|---|---|---|
| World Wide Corals | Black Chin Diamond Goby - Sri Lanka — < 2.25" / 1 | $32.99 | view → |
Shipping differs by vendor (free-shipping thresholds, flat overnight rates) and can change which vendor is cheapest to your door.
Reading today's numbers
Today's 2 in-stock listings sit in a fairly tight band, from $32.99 to $35.99, so the single vendor listing it prices it consistently, and the $34.49 median is a solid benchmark for its asking price.
Only one of the vendors we track currently lists it, so this range reflects a single store's listings rather than a cross-vendor comparison — worth keeping in mind when judging the price.
Keeping it alive once it arrives
Disclosure: the Chewy links below are affiliate links — if you buy through them we earn a commission, at no extra cost to you. This never affects the prices or vendor rankings above. Details.
A new fish cares most about being acclimated gradually to your tank's own water rather than dropped straight into it — shipping bag water is best kept out of the tank — and then about being offered food it will actually take. Chewy — a general pet retailer that sells no live coral or marine fish, and is not one of the vendors this index tracks — carries reef salt mixes, saltwater test kits, marine fish food, and coral and invertebrate food.
Price history
The market median for Diamond Watchman Goby has changed 21 times in 55 days of tracking. Median shifts here usually come from vendor promotion events or the in-stock mix changing rather than gradual drift (how these prices actually behave) — genuine repricings land on the price drops page as we observe them.
Common questions
Every answer below is computed from this page's own numbers at build time, and updates with the daily data refresh.
- How much does Diamond Watchman Goby cost?
- The median price is $34.49, based on 2 in-stock listings across 1 online reef vendor as of September 5, 2026. The range runs from $32.99 at the low end to $35.99 at the high end. Only one of the vendors the index tracks currently lists it, so this reflects a single store's listings rather than a cross-vendor comparison.
- Which vendors sell Diamond Watchman Goby?
- 1 of the online reef vendors the index tracks lists it as of September 5, 2026: World Wide Corals at $32.99. Each figure is that vendor's cheapest current listing.
- Has the price of Diamond Watchman Goby changed?
- Yes. The market median has changed 21 times across the 55 days the index has tracked it. Shifts here usually come from vendor promotion events or the in-stock mix changing rather than gradual drift.
- Is Diamond Watchman Goby in stock right now?
- 2 of the 4 listings the index tracks for it were in stock as of September 5, 2026, across 1 vendor.
Cite this page: Reef Price Index, "Diamond Watchman Goby price," data through September 5, 2026. https://reefpriceindex.com/species/diamond-goby
Related reading from our data
- Captive-Bred vs. Wild-Caught: What the Price Data Shows
- Do Reef Livestock Prices Actually Move? We Measured.
We check Diamond Watchman Goby prices at every vendor we track, every day. How the index works.