KERKENNAH ISLANDS, Tunisia ¨C A decade ago, Tunisian fisherman Ahmed Chelli¡¯s nets bulged with fish and octopus that he sold at the local market in the Kerkennah islands. Today, he pulls up only ¡°ISIS¡± ¡ª the name locals have given to the blue crabs that have invaded their fishing grounds in the fast-warming waters of the Mediterranean.
¡°The fisherman ... instead of finding fish to provide an income, he finds something that cuts his nets,¡± Chelli complained.
For more than 70 days this summer, a marine heat wave cooked the waters of the western Mediterranean.
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