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. AMNH 72487 1970 Acanthurus gahhm AMNH 72505 1970 Acanthurus gahhm AMNH 50968 1978 Acanthurus gahhm FW O1932-T 1994 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