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very elongate
head without cirriD X-XXVIII, 28-66small mouth, lower jaw heavy, protrudingpelvics I, 2-4, small, separateA 0, 23-61 -
length D2 base > distance D2 base to C basemembrane under opercle - 5 rayspelvics fused in disc or slightly separated
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bulbous head
eyes large, highD X-XIlarge mouthpelvic: I, 5, outer 2 strong, unbranched -
D IV-VI + I, 9-37mouth ~ vertical, lower jaw protrudespelvics I, 4-5, nearly separateA I, 9-36
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very elongate
large eyesD at rear, 15-22 unbranched raysC 13bones incompletely developedno pelvicsvertebral column end - a rod
no scales