Abstract
A new species of jawfish, Opistognathus albicaudatus, is described basedon two specimens, 91.4-94.8 mm SL, from the Andaman Islands. The combination of an elongate upper jaw produced as thin flexible lamina, and a unique colour pattern consisting of an abruptly white caudal fin and gill arches with a series of 8-10 small dark spotse, each near the base of a gill raker, distinguishes the new species from other congeners. Based on morphological similarity and general color pattern, the new species seems to be most closely related to Opistognathus varfabilis.Thesetwo species appear to have allo-patric distributions. A range extension for O. cyanospilotus is also reported.
NSTL