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  • 3 ocelli, 29-34 D rays to center top ocellus
    blind side dusky
    eye-side scales rough to touch
    Ancylopsetta antillarum, Antilles flounder
    D: rays 1-2 short, 3-5 long (no fleshy tips), rest short
  • D rays: 1st short, 2-4 long, 1-6 with- fleshy tips
    3 ocelli
    blind side pale
    Ancylopsetta cycloidea, Cyclope flounder
    pelvics: eye-side >/< 2X length blind side
    eye-side scales smooth to touch
    LL arched
  • D: 1st ray short, next 3 long, front rays - fleshy tips
    3 ocelli, 38-46 D rays to center top ocellus
    ocelli - outer white ring
    Ancylopsetta dilecta, Three-eye flounder
    pelvics: eye-side 2X length blind side
    eye-side scales rough to touch
    LL arched
  • D front rays short, no fleshy tips
    4 ocelli with dark centers
    blind side dark
    Ancylopsetta kumperae, Four-eyed flounder
    eye-side pelvic: ocellus at tip
    LL arched
  • 3 ocelli, rear one oval
    blind side dark
    eye-side pelvic <2X blind side fin
    Ancylopsetta microctenus, Gutherz’s flounder
    D rays: 1-2 short, 3-4 long, with fleshy tips
    eye-side scales smooth to touch
  • front D rays slightly elongate, no fleshy tips
    4 ocelli, pale centers
    blind side white
    Ancylopsetta ommatus, Ocellated flounder
    eye-side pelvic - no ocellus at tip
    LL arched
  • between eyes not narrow, no bony ridge
    D 71-82; A 52-60
    Citharichthys abbotti, Veracruz whiff
    top jaw 35-39% head
    lower head profile rounded
    gill rakers 21, 5-7 above
    LL straight, 42-49
  • wide, tapering oval
    adult head v wide, blunt, especially male
    v wide between eyes
    lower gill rakers long, slender, 18-24
    snout all scaled
  • elongate
    between eyes narrow, + ridge
    Citharichthys arctifrons, Gulfstream flounder
    top jaw < 33% head
    front snout: bony horn
    LL straight, 37-43
  • between eyes: not narrow, no ridge
    1st D ray 22-29% head
    D 68-84: A 48-63
    top jaw 39-44% head
    lower head profile angular
    gill rakers: 18, 4-6 upper
    LL straight, 42-50
  • eyes large
    snout with spine
    male: long snout spine, long top pectoral ray
    eye-side pelvic 6
    pectoral base - dark
    LL straight, 40-45
    snout with scales
  • eyes close-set, spine before
    D 90-95; A 70-76
    Citharichthys dinoceros, Spined whiff, Doublespot whiff
    top jaw: front canines overhang enclosed lower jaw
    gill rakers 3+7-10
    C: often 2 large spots
    D & A: row large spots
  • eyes large
    snout: spines
    male: long central D & A rays -> diamond shape
    male D & A: black blotch behind longest rays
    top jaw 39-44% head
    eye-side pelvic 5
    pectoral axil not dark
    LL straight, 33-37
    snout naked
  • body deep
    between eyes: narrrow + bony ridge
    D 79-82; A 59-63
    body & fins: dense, regularly arranged spots
    Citharichthys macrops, Spotted whiff
    top jaw 39-44% head
    edge blind-side operculum: leaf-like cirri
    LL straight
  • body deep
    between eyes: narrow + bony crest
    D 69-74; A 54-56
    Citharichthys minutus, Minute whiff
    top jaw 27-29% head
    gill rakers short, flat, 6-7 below
    LL straight, 34-36
    snout not scaled
  • eye small, between eyes narrow + crest
    elongate oval
    D 76-84; A 57-63
    end tail base: dark spot
    lower head profile angular
    gill rakers 3-5 + 11-12
    LL straight, 43-47
  • body deep
    eye small, between eyes narrow + crest
    D ~68; A ~52
    eye-side many small white flecks
    Citharichthys uhleri, Voodoo whiff
    LL straight, 52-55
  • body deep
    between eyes: narrow + bony crest
    D 78-86; A 60-66
    Citharichthys valdezi, Venezuelan whiff
    lower head profile angular
    gill rakers 3-5 + 7-9
    LL straight, 42-45
  • C 3 rear spots
    Cyclopsetta chittendeni, Mexican flounder
    dark blotch under pectoral
    pectoral: plain, edge oblique, 14-16
    LL straight, 74-80
  • C: central blotch
    Cyclopsetta fimbriata, Spotfin flounder
    dark blotch under pectoral
    pectoral: edge dark & straight, 11-12
    LL straight, 59-67
  • body deep
    scale edges & C margin dark
    Etropus crossotus, Fringed flounder
    lower gill rakers 7-8
    LL straight
    scales: snout no, accessory no
  • body deep
    4-6 dark rings above & below LL
    Etropus cyclosquamus, Shelf flounder
    lower gill rakers 3-6
    LL straight
    scales: + accessory, snout - not before nostrils, blind side smooth
  • body not deep
    Etropus delsmani delsmani, Delsman's flounder
    lower gill rakers 6-7
    LL straight
    scales: snout no, accessory no
  • body deep
    Etropus rimosus, Gray flounder
    lower gill rakers 3-6
    LL straight, 3 indistinct blotches
    scales: + accessories, snout to before nostrils, blind side rough
  • top head profile convex
    D origin well forward, front rays longer
    3 ocelli: 2 above, 1 below
    Gastropsetta frontalis, Shrimp flounder
    eye-side pelvic longer
    eye-side scales smooth
    LL arched
  • flat space between eyes
    large mouth, 1 row canines both jaws
    D 71-85; A 53-63
    triangle of 3 strong ocelli
    Paralichthys albigutta, Gulf flounder
    lower gill rakers 9-12
    LL arched, 78-81
  • flat space between eyes
    large mouth, 1 row canines both jaws
    D 80-96; A 61-73
    +/- 5 strong ocelli: 1 on LL, 2 each body profile
    Paralichthys dentatus, Summer flounder
    lower gill rakers 15+
    LL arched, 91-106
  • flat space between eyes
    large mouth, 1 row canines both jaws
    D 80-95; A 63-74
    no ocelli
    Paralichthys lethostigma, Southern flounder
    lower gill rakers 8-11
    LL arched, 85-100
  • eyes large, close-set, separated by ridge
    body edges - 2 pairs ocelli
    Paralichthys oblongus, Fourspot flounder
    LL arched, 63-95
  • flat space between eyes
    body deep
    large mouth, 1 row canines both jaws
    D 76-85; A 59-65
    no ocelli
    blind side dark
    lower gill rakers 10-12
    LL arched, 104-117
  • flat space between eyes
    large mouth, 1 row canines both jaws
    D 69-80; A 57-64
    small, asymmetric ocelli - body, D, A y C
    Paralichthys tropicus, Tropical flounder
    lower gill rakers 10-13
    LL arched, 95-98
  • body deep
    eyes moderately separated
    D 74-85; A 59-68
    tail base: dark blotch
    Syacium gunteri, Shoal flounder
    male: long top pectoral rays
    LL straight, 45-55
  • elongate
    eyes not wide apart
    top eye not well behind bottom eye
    D 83-92; A 64-74
    Syacium micrurum, Channel flounder
    male: long top pectoral rays
    LL straight, 54-68
  • elongate
    eyes v wide apart
    top eye well behind bottom eye
    D 82-94; A 64-75
    Syacium papillosum, Dusky flounder
    pectoral 3-4 dark bars
    male: blue lines on head
    male: long top pectoral rays
    LL straight, 47-60