Common name: Guadaloupe cardinalfish

General information

The Catalina Goby, also known as the Bluebanded Goby, is a small, brightly colored fish that is popular among aquarists for its vibrant hues and interesting behavior. Despite its common name, Apogon guadalupensis is not a true goby but belongs to the cardinalfish family. It is native to the cool, subtropical waters off the coast of California and Baja California.

This species is known for its distinctive blue bands that contrast sharply against a red or orange body. They are relatively small, reaching only about 2 inches in length, which makes them suitable for smaller aquariums.

Care

Catalina Gobies require cooler water temperatures than typical tropical reef fish, usually between 60-70 degrees Fahrenheit (15-21 degrees Celsius). They thrive in well-established aquariums with plenty of live rock for hiding and foraging. A varied diet of small meaty foods like mysis shrimp, brine shrimp, and finely chopped seafood will help maintain their health and coloration.

Reproduction

In the wild, Catalina Gobies are egg-layers, with males guarding and aerating the eggs until they hatch. In the aquarium, breeding can occur if the environment is stable and the fish are well-fed, but raising the fry can be challenging due to their small size and specific dietary requirements.

Habitat

Catalina Gobies are found in rocky reefs and tide pools, often in relatively shallow water. They prefer areas with strong water movement and access to crevices for shelter. In the aquarium, providing a similar environment with ample hiding places and moderate to strong water flow will help mimic their natural habitat.