Coral spawning

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Coral spawning
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Clip from Catalyst  |  ABC  |  October 3, 2017

Most corals only spawn once a year, the only window scientists have to trial hybridisation. Corals release tiny bundles of eggs and sperm that float to the surface of the ocean to break up and fertilise. Within a week, the fertilised eggs develop into planula larvae. Planula, no bigger than a grain of rice, must then begin searching for a suitable location and an algal partner (algae symbionts). Ruth Gates believes this moment holds the key for breeding hardier reefs.

Most corals only spawn once a year, the only window scientists have to trial hybridisation. Corals release tiny bundles of eggs and sperm that float to the surface of the ocean to break up and fertilise. Within a week, the fertilised eggs develop into planula larvae. Planula, no bigger than a grain of rice, must then begin searching for a suitable location and an algal partner (algae symbionts). Ruth Gates believes this moment holds the key for breeding hardier reefs.

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