Hairfin Goby

Yongeichthys nebulosus

The Hairfin Goby, known scientifically as Yongeichthys nebulosus, is a small reef-associated fish found in tropical waters of the Indo-West Pacific. It can be identified by its pale grey body adorned with three large dark brown blotches along its sides. The head and body exhibit faint brown scribbling patterns. Notably, the second and third dorsal spines are elongated and filamentous. This goby reaches a maximum length of 18 cm and has a rounded caudal fin that is slightly shorter than its head. The body scales are mostly ctenoid, except for cycloid scales on the breast, base of the pectoral fin, and the front part of the abdomen. It is typically found over silty and muddy bottoms around inner reefs, and is common in mangrove areas, occasionally venturing into estuaries and rivers. Divers encountering the Hairfin Goby will find it in shallow waters, as it inhabits depths ranging from 0 to 15 meters. The species is listed as Least Concern by the IUCN.