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  • pectorals pass A base, 1st 2 rays unbranched
    pelvics pass A origin, origin nearer A origin than pectoral insertion
    A origin under/behind 3rd D ray
    juvenile: no chin barbels
  • pectoral reaches past D, 1st ray unbranched
    D high, black spot
    A origin under/behind 3rd D ray
    jaws equal or lower longer, teeth noticeable to touch
    roof mouth with teeth
    pelvics: long, origin nearer head than lower C lobe
    juvenile: 2 chin barbels
  • 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
  • pectoral reaches past A base
    pelvic short, origin nearer pectoral origin than A origin
    juvenile: no chin barbels
  • pectoral reaches past D
    D fewer/same # rays as A
    pelvics long, origin nearer A origin than pectoral insertion
    A origen nearer operculum than C base
    juvenile: no chin barbels
  • top jaw protractile
    pectoral not reaching past A base
    pelvic reaches A origin
    branch of LL to pectoral base
    juvenile: 2 chin barbels