What is coral?

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What is coral?
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Clip from Catalyst  |  ABC  |  October 3, 2017

Professor Emma Johnstone explains the biology and life cycle of coral, from the calcium carbonate exoskeletons and venomous polyps to the photosynthesising symbionts that live in their tissue. But as ocean temperatures rise, the symbiotic relationship between the algae and the coral breaks down, causing the reef to bleach and decay. Ruth Gates, Director of the Hawai'i Institute of Marine Biology, is researching answers to this very real crisis in coral symbiosis.

Professor Emma Johnstone explains the biology and life cycle of coral, from the calcium carbonate exoskeletons and venomous polyps to the photosynthesising symbionts that live in their tissue. But as ocean temperatures rise, the symbiotic relationship between the algae and the coral breaks down, causing the reef to bleach and decay. Ruth Gates, Director of the Hawai'i Institute of Marine Biology, is researching answers to this very real crisis in coral symbiosis.

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