NATURAL WORLD: underwater photos show array of sea-life

Indonesian snapper Hengki Koentjoro's underwater photographs show an array of sea-life like as it's never been seen before.

He has pictured sharks, jellyfish, scuba divers and, perhaps most strikingly, a hard coral called the 'sunflower mushroom' which appears to be sporting a sinister grin.

Interestingly, he's chosen to use black-and-white film for the study.

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