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  • head smooth
    no groove under snout
    D origin on head
    A present
    tail ~1/3 TL
    few teeth, none between top jaws
    gill openings low, converging slits, close together below
    no pectoral
  • very elongate
    groove under snout
    D origin on head
    tail slightly < 1/2 TL, tip hard
    nostrils: front tubular, rear in mouth
    roof mouth - 2 rows teeth
    teeth between top jaws exposed
    gill openings low on side
    pectoral = tiny flap
  • snout pointed, overhanging, grooved below
    D: high, origin on nape
    tail < 40% TL, tip hard & finless
    front nostril tubular
    gill openings underneath
    no pectorals
  • snout very pointed
    front nostril = hole
    D (only fin) origin on head
    tail <1/2 TL, tip = hard,
    gill openings underneath
  • elongate (depth ~3.3% TL); tail 54% TL, tip blunt
    eye near snout tip, protrudes above
    D origin well behind pectorals
    snout long, straight, overhanging, tip curved down
    mouth long
    teeth long, conical, 3 rows above, 2 rows below, vomer 1 row large
    pectorals large, narrow base
  • body depth 2.2% TL; tail 63% TL
    front nostril tubular; eye small
    snout conical, overhanging, not grooved
    D origin mid-body
    tail tip flexible; C visible, joins D&A
    rear nostril before eye, in top lip, with flap
    teeth small, conical, single rows
    pectoral minute, visible