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  • nape scales - > well past preopercle edge
    lower body: 2 rows blotches, 7-8 upper, 3-4 on belly
    Bathygobius antilliensis, Antilles Frillfin, Antilles Frillfin Goby
    pectoral 18-21
    D1: 1-4 rows dark spots or 1 dark stripe
    lateral scales 38-42
  • nape scales - > at/ before preopercle edge
    body: no diagnostic color pattern
    Bathygobius curacao, Notchtongue Goby, Notchtongue Frillfin Goby
    top jaw long
    pectoral 15-17
    lateral scales 31-36
  • nape scales - > preopercle edge, +/- a few before
    lower body: 2 paired rows 6-8 oval blotches
    Bathygobius geminatus, Twinspotted Frillfin, Twinspotted Frillfin Goby
    pectoral 17-18
    lateral scales 36-38
  • nape scales rarely - > preopercle edge
    lower body: 2 offset rows 6-7 blotches
    Bathygobius lacertus, Checkerboard Frillfin, Checkerboard Frillfin Goby
    pectoral 18-20
    lateral scales 38-42
  • nape scales - > well before preopercle edge
    body: 3 saddles above, I row 6 large square blotches below
    D: 1-3 stripes, edge yellow
    C base: 2 dark spots
    Bathygobius mystacium, Island Frillfin, Island Frillfin Goby
    top jaw short
    pectoral 18-21
    lateral scales 35 (33-36)
  • nape scales to well before preopercle edge
    D1 broad vertical/oblique bar
    body: 3 saddles above + 6-7 flank blotches
    C base- large, dark, irregular blotch
    Bathygobius soporator, Frillfin Goby
    pectoral 18-21
    lateral scales 38-44