Diamond Watchman Goby (DWG100503) – XL Size, 4.5″ Approx
Valenciennea puellaris
Reef Compatible: Yes
Care Level: Beginner
Disposition: Peaceful
Min. Tank Size: 50 gallons
Mature Size: 8 inches
A living jewel for your reef aquarium. The Diamond Watchman Goby captivates with its shimmering, speckled pattern—each fish a unique masterpiece of natural artistry. Watch in wonder as this graceful swimmer glides through your tank, creating intricate sand tunnels and exhibiting endlessly entertaining behavior. Peaceful and beginner-friendly, it thrives in established reef systems while adding dynamic movement and visual intrigue. At 4.5 inches, this XL specimen is ready to become the centerpiece of your aquatic world. Bring home the elegance and tranquility of the ocean today.
| Specification | Detail |
|---|---|
| Species | Valenciennea puellaris |
| Size (Approx) | 4.5 inches |
| Reef Compatibility | Yes |
| Recommended Tank Size | 50 gallons |
| Mature Size | 8 inches |
| Behavior | Peaceful, active, sand tunneling |
| Difficulty Level | Beginner |
FAQ
Is the Diamond Watchman Goby suitable for a beginner reef keeper?
Yes, the Diamond Watchman Goby is peaceful and well-suited for beginner reef aquariums.
How big does the Diamond Watchman Goby grow in a tank?
It reaches a mature size of 8 inches, though it starts at approximately 4.5 inches.
Does this goby create sand tunnels in the tank?
Yes, it is known for creating intricate sand tunnels while swimming.

Ruth MacLeod –
Received my Diamond Watchman Goby in excellent condition. It’s very active and has started digging in the sand. The coloration is vibrant and it looks beautiful in my 50-gallon tank. Very peaceful and doesn’t stress other fish. A great addition to a beginner reef setup.
Matt Slater –
This goby has been in my tank for two months now. It’s constantly moving and creating small tunnels. The pattern on its body is stunning. I love how it adds life and movement without being aggressive. Highly recommend for reef tanks.
Pippa Walsh –
The fish arrived healthy and seems to be adjusting well. It’s active and not causing any issues with other tank inhabitants. A bit shy at first but now it’s swimming freely. Would buy again if I had a reef tank.