fish 1b: 1 mandible, 2 nasal opening, 3 eye, 4 cheek, 5 operculum, 6 dorsal fins, 7 lateral line, 8 caudal fin, 9 scales, 10 anal fin, 11 anus, 12 pectoral fin, 13 pelvic fin, 14 maxilla, 15 premaxilla, 16 upper jaw