Ostracion rhinorhynchos Bleeker, 1851
Horn-nose boxfish, 35cm

This appears to be Ostracion rhinorhynchos. Coloration in O. nasus and O. rhinorhynchos is similar and both can develop a large bump on the forehead. O. nasus differs in the presence of a hard ridge running lengthwise down the center of the back, while the back of O. rhinorhynchos is mostly flat. This one, photographed at Seraya near Tulamben, was dragging along a sharksucker (Echeneis naucrates).

Created 16 March 2023

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