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A scalloped hammerhead shark (Sphyrna lewini) near the surface, off Baja peninsula (Mexico). Sharks are feared and revered. The chances of being attacked by one of these enigmatic, perfectly evolved predators is virtually nil, yet humans persecute them relentlessly. Tens of millions of sharks are killed around the world every year – to make shark-fin soup, considered a delicacy in China – and many populations have been fished to extinction. As this photo of a critically endangered scalloped hammerhead shows, sharks are beautiful animals – and without them, our ocean ecosystems would collapse. (Photo by Mark Carwardine/naturepl.com/LDY Agency)
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