The splendid hawkfish has a moderately deep body and a slightly elongate snout. There are 25 or more small serrations on the upper margin of the preoperculum and the gill membrane across the throat does not have scales. The dorsal fin has 10 spines and 12 soft rays while the anal fin has 3 spines and 6 soft rays. The first dorsal fin ray is elongated. The uppermost and lower seven pectoral fin rays are elongated and robust. It is a relatively large hawkfish with a maximum published total length of. The body is grey on the head shading to white towards the tail. The snout and face are marked with reddish spots which have darkish margins, there are stripes on the nape and dark blotches on the flanks. There are spots on the tail and the base of the pectoral fin has orange-red spots.