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  • lower jaw not elongate
    Chriodorus atherinoides, Hardhead halfbeak
    19-23 gill rakers
    pectoral short, 13-14
  • body = very compressed ribbon
    C deeply forked
    Euleptorhamphus velox, Flying halfbeak
    beak very long
    pectoral very long
  • back blue
    C top lobe blue
    Hemiramphus balao, Balao halfbeak
    pectoral tips reach front edge nasal pit
    A 11-12 (10-13)
  • back green
    C top lobe orange-yellow
    Hemiramphus bermudensis, Bermuda halfbeak
    gill rakers 37-45
    pectoral tips not reaching nasal pit
    A 13 (12-14)
  • C top lobe orange-yellow
    Hemiramphus brasiliensis, Ballyhoo halfbeak
    gill rakers 28-36
    pectoral tips not reaching nasal pit
    A 13 (12-14)
  • slender (depth <12% SL)
    D & A bases scaled
    Hyporhamphus collettei, Bermuda silverstripe halfbeak
    gill rakers 30, 22
    D 14; A 17; pect 10
    Bermuda
  • snout > 70% eye
    Hyporhamphus meeki, False silverstripe halfbeak, Meek's halfbeak
    gill rakers 33-39
    scales cover D & A
  • Hyporhamphus roberti, Slender halfbeak
    gill rakers > 38
    scales on D & A: absent/few at front
  • snout < 70%
    body depth > 15% SL
    D 15; A 16; Pect 11
    Hyporhamphus unifasciatus, Atlantic silverstripe halfbeak, Common halfbeak
    gill rakers 31,24
    scales cover D & A
  • lower jaw slightly projecting (juvenile - short beak)
    Oxyporhamphus similis, Smallwing flyingfish, False halfbeak
    gill rakers 30-35
    pectoral ~1/3 SL, 11-13