Unique Characters: Huge, fanlike pectoral fins with free, fingerlike lower rays. Color variable with surroundings; often yellowish brown, with bright blue spots on pectoral fins. A moderately elongate fish. Head blunt, top and sides encased in a bony shield. A long, keeled spine extending posteriorly from the nape to below midbase of first dorsal fin. Angle of preopercle also bearing a long spine, with a serrate keel. Jaws with a band of small nodular teeth. Spinous and soft dorsal fins separated by a deep notch; anterior 2 dorsal-fin spines adjacent to each other, interconnected by a basal membrane, and not separated from remainder of spinous dorsal fin. Caudal fin emarginate, with 2 sharp keels on its base. Scales scute-like with sharp keels.
Similar Species: None.