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length D2 base > distance D2 base to C basemembrane under opercle - 5 rayspelvics fused in disc or slightly separated
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large eyes on top pointed headD1 IVLL extends onto Cgill opening = small pore on sidepreopercle: large hooked spineno scales
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ojos often stalkedD VII-XXIII
D & A long basesoperculum: fringe of skin flapsLL: bent, ends under tail base -
length D2 base < distance D2 base to Cmembrane under operculum - 6 rayspelvics widely separate
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flat head, elongate body1 D, at rear, no spinespelvics form large sucker with papillae
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nape + cirri1-2 Ds, more spines than soft raysfin rays unbranchedbody with smooth scaleswith LL
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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 -
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