00:00Coral, an animal in the same family as the jellyfish, shelters in its polyps microalgae
00:13called zooanthellae.
00:15The coral and the microalgae live in a relationship of mutual dependence.
00:18The microalgae provide the coral with its color and up to 90% of its energy comprising
00:23oxygen and organic molecules by the process of photosynthesis.
00:28The coral can then produce the calcium carbonate needed to build its skeleton.
00:33In exchange, the coral provides the algae with their habitat and the carbon dioxide necessary
00:38for photosynthesis.
00:41When stressed during high temperatures, pollution or acidification of the oceans, the corals expel
00:47the microalgae on which they depend to survive.
00:49They become white and can end up dying.
00:54Once the source of the stress disappears, the corals can recover their zooanthellae, but
00:59it depends on the duration and severity of the environmental stress.
01:02is much better.
01:13You
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