Common name: Rigilius goby

General information

The Hooded Shrimp Goby, scientifically known as Istigobius rigilius, is a small and fascinating fish species popular among saltwater aquarium enthusiasts. This species is known for its distinctive coloration and behavior. The body is typically tan with darker spots and a characteristic hood-like marking over the head, which gives it its common name.

Care

Hooded Shrimp Gobies are relatively easy to care for but do require a well-established tank with a sandy substrate to mimic their natural environment. They are peaceful fish that can be kept with other non-aggressive tank mates. These gobies are not picky eaters and will accept a variety of foods, including frozen and live offerings such as brine shrimp and mysis.

Reproduction

In the aquarium, breeding Hooded Shrimp Gobies can be a challenge. They are not commonly bred in captivity, and little is known about their breeding habits in the home aquarium. However, like many gobies, they are likely to spawn in a cave or crevice, with the male guarding the eggs.

Symbiosis

One of the most interesting aspects of the Hooded Shrimp Goby is its symbiotic relationship with pistol shrimp of the genus Alpheus. In the wild, the goby and shrimp share a burrow, which the shrimp maintains while the goby stands guard. The goby benefits from the shrimp's digging efforts and the shelter provided, while the shrimp relies on the goby's better eyesight to warn of approaching predators.

Habitat

Istigobius rigilius is found in the Indo-Pacific region, from the Red Sea and East Africa to Samoa, north to the Ryukyu Islands, and south to the Great Barrier Reef. They inhabit sandy areas near reefs and are often found at depths ranging from 1 to 30 meters.