<p>Head large and head length 2.2-2.7 in SL, orbit diameter 6.4-7.5 in head; interorbital broadly convex and width 4.1-5.2 in head. Snout length 3.6-4.6 in head. Mouth large and oblique, length of upper jaw 2.2-2.6 in head, maxilla width 7.1-8.6 in head, maxillary roundly truncate and extending to rear edge of eye, with small supplemental bone, only visible through dissection.</p><p>Dorsal fin XI, 15 ~ 17; anal fin III, 8; pectoral fin 16–20; pelvic fin I, 5; caudal fin 16-18; lateral-line scales 62-77; lateral scale series 130-151; gill rakers 9-11+15-17; head length 36.5-44.8% SL; eye diameter 5.3-6.1% SL, pre-orbital length 7.4-9.2% SL and depth 5.0-5.9% SL, interorbital width 7.4-8.9% SL; snout length 9.1-10.5% SL, maxilla width 5.0-5.3% SL, length of upper jaw 16.3-17.2% SL, lower-jaw length 11.3-12.0% SL; body compressed laterally, body depth 34.4-41.8% SL and width 14.4-19.8% SL; predorsal length 31.7-37.3% SL, dorsal-fin base 50.4-58.6% SL, first dorsal spine 3.5-5.7% SL, second dorsal spine 7.8-12.0% SL, longest dorsal spine (usually fourth spine) 11.3-14.0% SL, last dorsal spine 8.2-9.8% SL, longest dorsal ray 12.7-14.4% SL; pre-anal length 66.7-71.4% SL, anal-fin base 12.8-17.6% SL, first anal spine 2.6-3.5% SL, second anal spine 5.9-6.4% SL, third anal spine 7.8-10.3% SL and longest anal ray 15.9-16.0% SL; pectoral-fin length 17.0-19.3% SL; prepelvic length 30.9-35.7% SL, pelvic-fin length 16.3-19.4% SL, pelvic-spine length 9.7-10.3% SL; caudal-fin length 19.1-23.1% SL, caudal-peduncle length 16.0-20.6% SL and depth 11.3-11.6% SL (see Table 1).</p>
Sumber: Epinephelus rankini Whitley, 1945, a valid species of grouper (Teleostei, Perciformes, Epinephelidae) from Western Australia and southeast Indonesia