17471 Acanthurus gahhm (Forsskål, 1775) Acanthuridae Surgeonfishes, tangs, unicornfishes Acanthurinae Acanthuriformes Teleostei Black surgeonfish Western Indian Ocean: endemic to the Red Sea and the Gulf of Aden. ZMH 18409 Acanthurus gahhm ZMH 18410 Acanthurus gahhm ZMH 18413 1888 Acanthurus gahhm ZMH 18412 1911 Acanthurus gahhm AMNH 72487 1970 Acanthurus gahhm AMNH 72505 1970 Acanthurus gahhm AMNH 50968 1978 Acanthurus gahhm FW O1932-T 1994 Acanthurus gahhm SPCP 0416 1999 Acanthurus gahhm 21 N 38 E 2008 Acanthurus gahhm 22 N 38 E 2008 Acanthurus gahhm 22 N 38 E 2008 Acanthurus gahhm 22 N 38 E 2008 Acanthurus gahhm 23 N 37 E 2008 Acanthurus gahhm 18 N 40 E 2009 Acanthurus gahhm 19 N 40 E 2009 Acanthurus gahhm 19 N 39 E 2009 Acanthurus gahhm 24 N 37 E 2011 Acanthurus gahhm 24 N 37 E 2011 Acanthurus gahhm 25 N 36 E 2011 Acanthurus gahhm