This species is distinguished from P. ryukyuensis by the following set of characters: pectoral-fin rays 12-13; scale rows below the lateral line 10; supraneurals 2, small head, its length 42.5% SL, with rounded upper profile; slightly convex in postorbital region; eye small, its diameter 11.9% SL; anterodorsal margin is not protruding above the dorsal head profile; caudal fin is slightly convex; fourth dorsal-fin spine long, its length 20.0% SL; pre-pelvic-fin short, its length 34.8% SL; pectoral fin short, its length 37.0% SL; pelvic-fin spine long, its length 19.6% SL. Colouration: body with an arched orange band from bases of 7th to 9th dorsal-fin spines to middle of caudal-fin base; yellowish-orange spots and blotches on the snout, cheek, jaws, nape, and spinous portion of the dorsal fin (Ref. 132549).