Figure 2

Images of lionfish presenting signs of an ulcerative skin disease (indicated with arrows). (a) Ulcerated lionfish 15 d following their initial report in the northern Gulf of Mexico in August 2017 (Apalachicola, FL, photo: A. Fogg). Conspicuous ulcers were observed in various anatomical locations, including (b) the dorsal fin spines base (October 2017, Destin, FL, photo: H. Harris) and (c) posterior the pectoral fin base (image taken underwater, December 2019, Destin, FL, photo: A. Fogg). Lionfish were also reported to the authors with similar signs elsewhere in the invaded range, including (d) Grand Cayman Island (September 2017, photo J. Washington) and (e) Bonaire (March 2018, photo: J. Spruit).