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  • diamond shape
    head angular
    front D & A: long filaments
    bases of dorsal rays - dark blotches
    no canines
    operculum: elongate black blotch
  • body high, very compressed
    forehead steep, rounded
    D & A no rear finlets
    superficially scaleless
    LL: scutes - tail base only
    juveniles: front D & A rays = filaments
  • nape profile rounded
    forehead concave, high
    D & A filamentous lobes
    large scaleless area on breast to behind pelvics onto pectoral base
    pelvics not tiny
    juvenile: D, A & pelvics filamentous