Cryptocentrus cinctus
The Yellow Watchman Goby, *Cryptocentrus cinctus*, is a popular and charismatic addition to the home aquarium. This striking goby is easily recognized by its bright yellow body, often adorned with small blue or white spots, and its large, expressive eyes.
In the aquarium, the Yellow Watchman Goby typically reaches a size of about 3-4 inches. They are known for their fascinating symbiotic relationship with pistol shrimp (Alpheus species). The goby acts as a lookout, warning the nearly blind shrimp of danger, while the shrimp maintains a burrow that they both share. While they can be kept without a pistol shrimp, providing a suitable substrate for burrowing is essential for their well-being. A sand bed of at least 2-3 inches is recommended.
The Yellow Watchman Goby is a peaceful fish and is generally compatible with a wide variety of tank mates, as long as they are not overly aggressive or large enough to consume the goby. They are reef-safe and will not bother corals or invertebrates.
Their diet should consist of a variety of meaty foods. They readily accept frozen mysis shrimp, brine shrimp, and other small frozen or live foods. Offering a varied diet will help ensure their long-term health and vibrant coloration. They are typically bottom feeders and will sift through the sand for food.
A minimum tank size of 20 gallons is recommended for a single Yellow Watchman Goby. If keeping with a pistol shrimp, a slightly larger tank may be beneficial to provide ample space for burrowing. Provide plenty of live rock and hiding places to make them feel secure.
Distinguishing between male and female Yellow Watchman Gobies is difficult, and they are not commonly bred in captivity. They are a hardy and rewarding fish for both beginner and experienced aquarists.