“Coral reefs are the most biodiverse habitat on the planet, despite covering less than 1 percent of the ocean area, over a quarter of all marine life exists in these rainforests of the sea. And if you think of a coral reef as a rainforest, the trees are the coral themselves. Which are incredible organisms, so, magic is really the right word to describe them. They're these animals that are one of the original forms of animal life, the second branch of the animal kingdom is actually Cnidaria, which includes coral and jellyfish. So, an ancient animal, but they have a symbiotic relationship with algae, and so inside the animal tissue are these zooxanthellae, these algae that do photosynthesis, like algae do, like plants do. It's able to capture sunlight and convert it into sugars and energy. And so, it's an animal, but it's got plants that live inside it, this algae, and then even more wild - it grows a skeleton that is rock!

So coral skeleton is actually calcium carbonate, which is limestone. And most of the limestone that exists on the earth was grown by these organisms. And so they're animals with plants inside of them that grow rock as skeleton. And the rock skeletons form these incredibly intricate structures that are coral reefs that can grow for thousands of miles and the corals can live for thousands of years to be seen from space and to create these essential ecosystems that are really the cornerstone of all of life in the ocean and, and therefore much of life on Earth.”

Broadcast on:

16 Nov 2023