Myomeres 26 (9-10+16-17); dorsal fin and pelvic fin spines smooth, third dorsal fin spine elongate; no supraoccipital crest; longest interopercular spine 52-100% length of longest preopercular spine by postflexion stage; first dorsal fin and pelvic fin pigmented.
Pigmentation:
Preflexion-postflexion: At tip of lower jaw; internally over hindbrain, spreading onto midbrain between 4.2-5.9 mm; externally over midbrain between 5.9-6.8 mm; on gas bladder; anteriorly and dorsally on gut except little or none over hindgut; on preanal finfold adjacent to anus, usually absent after 4.2 mm; often 1-2 on dorsal margin at about myomere 5-7 before 3.4-3.6 mm, none between about 3.6-11.0 mm, then few along dorsal fin base; 5-8 on ventral margin of tail, decreasing to 1-2 during flexion stage; 1-few under notochord tip becoming located proximally on lower caudal fin rays; on pelvic fin; on dorsal fin between spines III-IV (spine III forms first), spreading to spine VI-VII during postflexion stage.
Sequence of fin development: first dorsal fin and pelvic fin, principal caudal fin rays and anal fin, second dorsal fin and pectoral fin, procurrent dorsal fin rays. |