Diamond Watchman Goby (Valenciennea puellaris)
If you want a clean sandbed without the hassle, the Diamond Watchman Goby is one of the best additions you can make to your reef tank. Known for its constant sand-sifting behaviour, this fish helps keep your substrate aerated, clean, and free of detritus—all while adding subtle beauty with its white body and bright orange spotting.
This species spends its time scooping up mouthfuls of sand, filtering out food, and expelling clean sand back into the tank—making it both functional and fascinating to watch. It’s peaceful with most tank mates, though it can be territorial with other gobies unless paired.
Diamond Gobies thrive in established tanks with plenty of live sand and rockwork, where they can build burrows and feel secure. A healthy sandbed is key to their long-term success.
Why you’ll love it:
- Constantly sifts and cleans the sandbed
- Helps maintain a healthier substrate
- Peaceful and reef safe
- Unique behaviour and interesting to watch
- Subtle but beautiful orange-spotted pattern
Care Guide (Quick Overview):
- Tank Size: 100L+ recommended
- Temperament: Peaceful (territorial with similar species)
- Diet: Mysis shrimp, brine shrimp, frozen foods, live foods
- Reef Safe: Yes
- Max Size: ~15cm
⚠️ Important: Requires a mature sandbed to thrive. Supplement feeding is essential, especially in newer systems.
