Firefish
BeginnerCryptocentrus cinctus
Small goby with cute yellow body and blue dot pattern. Famous for symbiosis with pistol shrimp, where shrimp digs burrow and goby stands watch. Hardy and easy to keep.
The watchman goby (Cryptocentrus cinctus and related species) is a sand- and mud-dwelling gobiid fish native to the Indian and Pacific Oceans. Its vivid yellow body scattered with electric blue spots gives it striking ornamental appeal. It is best known for its mutualistic partnership with pistol shrimp (genus Alpheus): the shrimp excavates and maintains a burrow in the sandy substrate, while the goby stands sentinel at the entrance, warning its nearly blind partner of approaching danger through fin movements. This perfectly complementary division of labor is one of the most compelling behavioral partnerships observable in the home aquarium. A deep, fine sand substrate (minimum 5 cm) is mandatory; introducing the goby and shrimp together maximizes the likelihood of bonding. Peaceful and manageable in 60–100 litre tanks.
Origin
Sandy and muddy substrates of the Indian and Pacific Oceans
Lifespan
3-5 years
Size
8-10cm
Temperature
24〜27℃
Pellets, frozen foods
Specific gravity 1.023-1.025
Sand bottom required. Symbiosis with pistol shrimp is fun to observe
Peaceful, compatible with many fish
Watch for jumping. Always use a lid
Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.
The ideal temperature for Watchman Goby is 24〜27℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Watchman Goby is 3-5 years. With proper care and nutrition, they can live a long and healthy life.
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Watchman Goby typically reaches 8-10cm as an adult. Size may vary depending on care conditions and individual genetics.
Watchman Goby feeds on: Pellets, frozen foods. Aim for a balanced diet with appropriate feeding frequency.
The price of Watchman Goby varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
