Key to species of Giganthias

1. First four dorsal spines with expanded and coarsely serrated tips; 12 dorsal-fin soft rays; pectoral-fin rays 13–14............................................................................... Giganthias serratospinosus (Indonesia) Expanded and serrated tip only present on the third dorsal-fin spine; 13 dorsal-fin soft rays; pectoral-fin rays 16............................................................................ Giganthias immaculatus (Japan and Taiwan)