Cryptocentrus cf. Cinctus (Tiger Watchman Goby / Ward’s Tiger Goby)
• Small fish safe: ✅ Yes
• Small invert safe: ✅ Yes
• Coral safe: ✅ Yes
• Minimum tank size: 100L+ (preferably 120L+ for a bonded pair)
• Adult size: ~12 cm (5 inches)
• Diet: Carnivorous (marine pellets, frozen mysis/brine shrimp, and finely chopped seafood)
• Be aware of: Forms a symbiotic relationship with pistol shrimp. Can be territorial towards other sand-dwelling gobies. Prone to jumping if startled—secure lid required.
Tiger Watchman Goby (Cryptocentrus cf. cinctus) – A Hardy and Beneficial Sand Sifter
The Tiger Watchman Goby, also known as Ward’s Tiger Goby, is a strikingly patterned, bottom-dwelling fish that plays an essential role in aerating and maintaining the sand bed in reef aquariums. Known for its bold tiger-like stripes and partnership with pistol shrimp, this goby adds both function and personality to a marine tank. It is a peaceful and hardy species, making it an excellent choice for beginner and experienced aquarists alike.
Appearance and Coloration
Tiger Watchman Gobies are instantly recognizable due to their unique striped patterning:
• A light tan to golden body, often with a subtle gray hue.
• Dark brown or black tiger-like stripes running vertically along the body.
• A broad, frog-like head with large, expressive eyes.
• Blue and white speckling on the face and fins, adding an iridescent touch.
• Elongated dorsal and pectoral fins, allowing them to perch near their burrow.
As with most gobies, males tend to be slightly larger and may develop more pronounced fin extensions.
Natural Habitat and Behaviour
Tiger Watchman Gobies are native to the Indo-Pacific region, where they inhabit lagoon reefs and sandy seafloors, where they:
• Live in burrows, often in partnership with pistol shrimp (Alpheus spp.).
• Are highly territorial towards other sand-dwelling gobies.
• Constantly sift through the sand, cleaning up detritus and improving substrate health.
• Remain close to their burrow, darting inside when feeling threatened.
In captivity, they thrive best when paired with a compatible pistol shrimp, forming a fascinating, natural partnership that enhances the tank’s ecosystem.
Tank Requirements and Water Parameters
Tiger Watchman Gobies require a stable, well-maintained tank with a soft substrate for burrowing.
• Minimum tank size: 100L+ (120L+ recommended for pairs or shrimp-goby partnerships)
• Temperature: 24–27°C (75–81°F)
• pH: 8.1–8.4
• Salinity: 1.020–1.025
• Water movement: Moderate (gentle currents preferred)
• Filtration: Good-quality filtration and regular water changes to maintain clean conditions.
A tank with fine sand and small rock caves will help the goby establish a burrow. Avoid coarse gravel, as it can cause injury.
Diet and Feeding
Tiger Watchman Gobies are carnivores and require a protein-rich diet.
Recommended foods include:
• Frozen mysis and brine shrimp – Their primary diet in captivity.
• High-quality marine pellets and flakes – Enriched formulas work best.
• Finely chopped seafood (shrimp, squid, or fish) – Occasional treats.
• Live foods (copepods, amphipods, or blackworms) – Enhances natural feeding behavior.
Feed once or twice daily, ensuring food reaches their territory, as they often remain near their burrow.
Compatibility and Tank Mates
Tiger Watchman Gobies are peaceful but territorial, making them great for:
✔ Pistol Shrimp, particularly Randall’s Pistol Shrimp (Alpheus randalli) – Forms a symbiotic bond.
✔ Peaceful to semi-aggressive tank mates, such as Clownfish, Fairy Wrasses, Basslets, and Blennies.
✔ Reef-safe invertebrates, including shrimp, snails, and crabs.
Avoid housing with:
❌ Other sand-dwelling gobies, unless in a very large tank.
❌ Overly aggressive fish, such as Triggerfish, aggressive Dottybacks, or large Wrasses.
❌ Fast-feeding fish, as they may outcompete the goby for food.
If keeping a mated pair, introduce them at the same time to prevent territorial disputes.
Burrowing and Shrimp-Goby Symbiosis
Tiger Watchman Gobies naturally form symbiotic relationships with pistol shrimp, where:
• The shrimp digs and maintains a burrow, while the goby provides protection.
• The goby rests at the entrance, using its excellent eyesight to detect threats.
• If danger is near, the goby flicks its tail, signaling the shrimp to retreat inside.
If introducing a goby and shrimp together, ensure they are compatible, as not all pistol shrimp species will form a bond.
Health and Disease Considerations
Tiger Watchman Gobies are resilient, but they can be susceptible to:
• Marine Ich (Cryptocaryon irritans) – Stress-related; quarantine new fish before introduction.
• Bacterial infections – Often caused by poor water quality or injuries from burrowing.
• Malnutrition – Ensure they get enough food, especially in competitive tanks.
Keeping stable water conditions, offering a high-protein diet, and ensuring a stress-free environment will keep them healthy.
Lifespan and Long-Term Care
With proper care, Tiger Watchman Gobies can live up to 5-8 years in captivity. Their hardy nature, fascinating shrimp symbiosis, and playful behavior make them a favorite among reef aquarists.
Why Choose a Tiger Watchman Goby?
✔ Striking tiger-striped pattern – Visually unique.
✔ Pairs with pistol shrimp for a fascinating display.
✔ Hardy and adaptable, making them great for beginner and experienced aquarists.
✔ Can live long lives, up to 8 years in captivity.
✔ Reef-safe and beneficial – Helps aerate the sand bed.
⚠ Important Considerations Before Buying a Tiger Watchman Goby:
🚫 Can be territorial – Best kept singly or in a bonded pair.
🚫 Requires a fine sand substrate – Coarse gravel may cause injury.
🚫 Jumps when startled – A secure lid is recommended.