Common name: blue-and-red-spotted goby

General information

The Blue-spotted Watchman Goby, Cryptocentrus caeruleopunctatus, is a small, colorful fish that is a popular choice for reef aquariums. It is known for its distinctive blue spots and peaceful demeanor. This species is relatively hardy and can be a good candidate for beginners as well as experienced aquarists.

Care

Blue-spotted Watchman Gobies are bottom dwellers that prefer a sandy substrate where they can burrow. They require an aquarium with plenty of live rock to provide hiding places and a stable environment. These gobies are not demanding when it comes to diet and will accept a variety of foods including frozen and live meaty foods, as well as some prepared foods.

Reproduction

In the aquarium, Blue-spotted Watchman Gobies may form monogamous pairs and spawn within the safety of their burrows. The male typically guards the eggs until they hatch.

Symbiosis

An interesting aspect of Cryptocentrus caeruleopunctatus is its symbiotic relationship with certain pistol shrimps, such as those from the genus Alpheus. The shrimp maintains the burrow while the goby serves as a lookout, warning the shrimp of approaching predators.

Habitat

Blue-spotted Watchman Gobies are found in the Indo-Pacific region, inhabiting shallow lagoons and coral reefs. They are often seen in pairs or small groups near their burrows in the substrate.