The collective noun for sharks is, apparently, a shiver. It's not a word I expected to use in a tropical lagoon but, surrounded by more than a dozen of them circling so close that they actually brushed my skin, it was the perfect fit. And not just sharks: stingrays too, a metre across, trailing their stiff and treacherous tails. It was all exactly what had been ordered.
"Tahiti's not just about honeymooners lying on beaches," I'd been told. "Try the exciting activities! Get adventurous!"
So here I was, neck-deep in Moorea's lagoon on an excursion that had promised ray and shark feeding, hoping not to be part of the menu. "They're just black-tipped reef sharks," guide Stefan tutted. "They don't bite. But don't touch the rays' tails," he added unnecessarily before slipping into the water to be mobbed by a handful of them, boisterous as puppies.
Trusting in the safety of numbers, the 50 of us on the catamaran followed him in, to discover at once that rays feel soft and smooth, like an old rubber spatula, and are about as threatening. All our shrieks were of pure delight, and an hour whizzed by before we reluctantly climbed out again to go for our island picnic - though the sharks' feeding frenzy as they finally got the fish-scramble they'd been waiting for made us feel better about leaving the water.