Divers watch manta ray (7 images)

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An enormous manta ray dwarfs a group of divers as it swims over them with its mouth wide open - and it is big enough to swallow a human in one.

Luckily for the divers, the ray was only feeding on thousands of tiny plankton but their size was still intimidating.

Masa Ushioda, 46, was one of the group swimming some 40ft underwater and watched in awe as the graceful 16ft long animals swam serenely around them.

He described how the rays were very careful to...
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