3Rhode Island, USA

Blue sharks. As well as boasting some of the best shipwreck dives in the world Rhode Island also offers blue and mako shark expeditions.

Named after their radiant colour, blue sharks migrate thousands of miles each year but in certain areas come close to the shoreline. Encounters with the sharks usually don’t involve scuba diving kit but a full wetsuit is required along with a hood, gloves, mask, fins and snorkel.

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