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  • D height >10% SL, with black spot
    pectorals blue-black, outer edge & lower rays clea
    C: both lobes same color
    jaw teeth noticeable to touch
    sides roof mouth with teeth
    juvenile: barbels >59% SL, with fleshy axis
    nape scales before D 33-41
  • D height >10% SL, with black spot
    pectorals black + pale cross-bar
    C: lower lobe obviously darker
    jaw teeth noticeable to touch
    sides roof mouth with teeth
    juvenile: barbels flat, <40% SL
    nape scales before D 24-29
  • D height<10% SL, no black
    pectoral black + pale crossbar & broad pale margin
    jaw teeth not noticeable
    sides roof mouth: no teeth
    juvenile: barbels >37% SL
  • head < 22%
    D height < 10% SL, no black
    pectoral grey + pale triangular cross-bar & narrow clear edge
    jaw teeth not noticeable
    sides roof mouth: no teeth
    scales along center nape 30-35
  • head > 23% SL
    D height < 10% SL, no black
    pectoral grey + indistinct pale triangular cross-bar & narrow clear edge
    jaw teeth not noticeable
    sides roof mouth: no teeth
    scales along center nape 27-30
  • pectoral reaches past D, 1st ray not branched
    A origin under/behind 3rd D ray
    lower jaw shorter than & enclosed by top jaw
    roof mouth with teeth
    pelvics: long, origin midway head & C base
    juvenile: 1 chin barbel