The anisakid nematode Sulcascaris (S.) sulcata is one of the most frequently reported pathogenic parasites of the gastrointestinal tract of sea turtles, with a wide distribution in warm marine ecosystems of the Pacific, Atlantic, and Mediterranean basins. Sea turtles, including the Mediterranean loggerhead turtle (Caretta caretta), act as definitive hosts by ingesting infected bivalve and gastropod mollusks containing fourth-s...