Common name: Robust cusk

General information

The Ryukyu Goby, scientifically known as Alionematichthys riukiuensis, is a small and fascinating fish species that is a member of the goby family. This species is not as commonly found in the aquarium trade as some other gobies, but it can be a unique addition to a peaceful community tank. The Ryukyu Goby is known for its subtle coloration, typically displaying a combination of pale yellow and white with fine, darker markings that provide excellent camouflage against the sandy and rocky substrates of its natural habitat.

Care

Ryukyu Gobies are small, reaching only about 2 inches in length, and are well-suited for nano or small-sized aquariums. They prefer tanks with plenty of live rock and a sandy substrate that allows them to exhibit their natural behaviors, such as sifting through the sand for food. These gobies are peaceful and can be kept with other non-aggressive tank mates. They thrive on a varied diet of meaty foods, including brine shrimp, mysis shrimp, and finely chopped seafood.

Reproduction

Little is known about the specific reproductive behaviors of Alionematichthys riukiuensis in the wild or in captivity. However, like many gobies, they are likely to be demersal spawners, laying their eggs in a secure location where the male can guard and aerate them until they hatch.

Habitat

Alionematichthys riukiuensis is native to the Ryukyu Islands in Japan, where it inhabits shallow coastal waters. It is often found in association with rubble and coral fragments, which provide shelter and feeding grounds. In the aquarium, replicating this environment with a combination of live rock and a sandy bottom will help the Ryukyu Goby feel at home.