ELEOTRIDAE Ophiocara porocephala, 7.4 cm SL (photo by Ukkrit Satapoomin) Ophiocara porocephala, 17.5 cm SL (from Seram, Indonesia; photo by Seishi Kimura) Ophiocara porocephala (Valenciennes, 1837) Northern Mud Sleeper D VI + I, 8-9; A I, 7; P1 14-15; LR 33-37; Pred.S 18-26. Body moderately elongate, subcylindrical and compressed posteriorly. Head depressed; dorsal surface of head flat; jaws large, extending posteriorly to middle of eye; lower jaw protruding beyond upper jaw. Pelvic fins widely separated. Cheek and operculum with cycloid scales; predorsal scales extending anteriorly to snout. Color: blackish brown, sometimes with irregular barred pattern on body; in young, numerous minute pale spots scattered on head, body and dorsal and anal fins. Size: 45 cm. Distribution: Indo-West Pacific. Remarks: chiefly found in tidal estuaries. Carnivorous. Often marketed fresh.