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To Survive, Corals Turn the Ocean into a Giant Snow Globe

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Rating: 4.5; Vote: 2

About 10 days after a full moon, an upside-down underwater blizzard occurs. Tiny spheres float up the water column. But they're not sand particles or algae, they're packets of egg and sperm from coral. This snowlike spectacle is known as coral spawning. Corals are not plants or rocks, but colonies of hundreds of thousands of tiny animals called polyps. These polyps look like underwater flowers, with a soft body, a mouth and tentacles. Polyps obtain nutrients from single-celled algae called zooxanthellae, which live in their tissue. The coral provides protection and compounds for photosynthesis. In return, zooxanthellae supply elements to build calcium carbonate skeletons that give them their stony structure. Corals can’t move to find a partner and mix up their gene pool, so they’ve adapted a unique reproductive strategy that allows their eggs and sperm to fertilize with other colonies. The polyps release their gamete bundles together, at a time determined by environmental factors determined by the lunar cycle, setting sun, and temperature. Scientists believe this ensures high levels of fertilization across the ocean. --- What are corals known for Coral reefs provide habitat for a quarter of marine life, including fish, crustaceans, mollusks and sea turtles. Corals can be found throughout the world’s oceans, in both shallow and deep water. How long can a coral live Studies have shown that some corals can live up to 5, 000 years, making them the longest- living animals on Earth. --- Do all corals live in warm water No. In fact, over half of all known coral species are found in cold, deep and dark waters. These corals feed by waiting for small food particles to swim by, and they lack the symbiotic algae that live in the tissue of warm water corals. Do corals have other forms of reproduction There are many species of coral, but only two main types of reproduction. Corals reproduce either asexually, by budding, fragmentation and fission, or sexually, through broadcast spawning and brooding.
Date: 2024-02-06

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Comments and reviews: 5

zooemperor3954
So the light of a waning moon is a factor I generally thought it was a full moon. You learn something new every day. And hopefully we can protect coral reefs from dying off.
Thanks Deep Look! Can’t wait to see more.
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yashnigam2704
You can feel the scientists here truly love and care what they do. Thank you for giving us a view of the world which many of us won't be able to see live throughout our lifetimes. Love from India.
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deeplook
Coral are one of the worlds first animals, they have survived 5 mass extinctions. It should mean more to us that this incredibly resilient species cannot keep up with human-accelerated climate change.
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liveinamber1307
Based on the title alone, I thought corrals were somehow responsible for freezing the poles. 'w
Although. based on the video, maybe they should.
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markembeck7099
You keep outdoing yourselves - videography, narration and music composition are outstanding! Thanks for the wonderful production!
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