The Lemon Coralgoby (Gobiodon citrinus), also known as the undefined Goby, is a small, colorful fish native to tropical marine environments of the Indo-West Pacific region. It can be found from the 🌊 Red Sea and the African coast all the way to 🇯🇵 Japan, 🇼🇸 Samoa, and the Great Barrier Reef. Typically residing in reef environments, these gobies live at depths ranging from 2 to 20 meters (7 to 66 feet) and form close associations with Acropora corals.
This species is known for its variable coloration, which can range from pale yellow to dark brown. Notable features include distinctive blue vertical lines around their eyes and gills, and a blue stripe running along the base of the dorsal fin. The Lemon Coralgoby can grow up to 6.6 centimeters (2.6 inches) in total length.
In addition to their vibrant appearance, they have some unique biological traits. The fish produce a toxic mucus, likely serving as a defense mechanism. They are also known to breathe air when necessary, thanks to an adaptation within their genus. The fish often exist solitarily or in pairs and primarily feed on small invertebrates and zooplankton. They are oviparous, laying eggs that develop on the ocean floor, and have been successfully reared in captivity, making them a popular choice in the commercial aquarium trade.
Despite their small size, the Lemon Coralgoby are important members of their ecosystem, particularly as they engage in symbiotic relationships with coral species. They contribute to both the biodiversity and the intricacy of the coral reef environment they inhabit.
Why it's threatened
Threat classification from the IUCN Red List.
