In situ observations and photographs of the Caribbean roughshark, Oxynotus caribbaeus Cervigón, 1961, are reported for the first time from four widely separated localities around the tropical western Atlantic, including multiple records over an 8-yr period from a single locality off Roatán, Honduras. These records document an extension of the known geographic, bathymetric, and temperature ranges of the species to include southern Florida and the western Caribbean Sea, over a depth range of 218 to 579 m, and in water as warm as 16.39°C.

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