Description Underwater photographs of Acanthurus tractus (A to C) and Acanthurus bahianus (D to F). Note the clear and consistent difference in the coloration of the margin of the caudal and dorsal fins.
Photographs by J. Randall (1A), D. Snyder (1B, 1C), O. Luiz-Junior (1D, 1E) and G. Allen (1F).
Source: Bernal, M. A.; Rocha, L. A. (2011). Acanthurus tractus Poey, 1860, a valid western Atlantic species of surgeonfish (Teleostei, Acanthuridae), distinct from Acanthurus bahianus Castelnau, 1855. Zootaxa. 2905, 63-68PNG file - 4.29 MB - 1 800 x 1 740 pixelsadded on 2018-11-0833 viewsWoRMS taxaDigital photo, entire speciesAcanthurus bahianus Castelnau, 1855checked Bailly, Nicolas 2018-11-08Digital photo, entire speciesAcanthurus tractus Poey, 1860checked Bailly, Nicolas 2018-11-08 This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License
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