Blue Shark
Prionace glauca
Sighting evidence at Sagres Wrecks, Algarve
Blue sharks appear off Sagres from May through October, drawn by the cape's upwelling productivity and the schools of mackerel and sardines that aggregate there. As highly migratory oceanic apex predators they are critical to regulating pelagic fish populations across the North Atlantic, yet remain among the most heavily fished shark species worldwide. Their appearance on wreck dives — circling curiously at the edge of visibility — is one of the signature encounters of the Algarve summer season.
Evidence at this site
No confirmed records on file at this site
Blue Shark is listed as a curated species here based on historical reports.