This issue is packed with stories on wrecks, nudibranchs, sea turtles and sharks. We visit dive destinations at Leje de Santos in Brazil and the picturesque village of Calella on the wild coast of Spain. Arnold Weisz investigates effects of the treasure trade. Learn how carbon emissions is changing the acidity of the seas and the effects on sealife. South African underwater photographer, Fiona Ayerst, reports on the tragic loss of eight Tiger sharks, three of them poached in protected waters. Andrey Bizyukin translates an interview with explorer Anatoly Sagalevich who touched bottom at the North Pole. Cedric Verdier discusses diver safety and rescue in very remote areas. Get a report on Moscow's Golden Dolphin dive show, an inside perspective of IAHD's education for disable divers, Shawna Meyer's close encounter with Humboldt squid, and tips from Kurt Amsler on shooting wrecks. We interview fine art and commercial photographer, Howard Schatz, about his latest book, H2O.