Sifting out coral sperm and eggs

Corals can reproduce asexually – meaning their bud off a clone every now and again – but once a year, some reefs indulge in an oceanic orgy.


A researcher from Australian government science organisation CSIRO collects gametes – sperm and eggs – from the stony coral species Acropora millepora in a lab at Exmouth, Western Australia.

As corals spawn at night, the biologist must wear a red headtorch to fool them into thinking it's still past dusk.

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