Coral reefs are the most biodiverse spots in the sea, hosting up to 2 million species in their colorful sprawl. Unfortunately, these ecosystems are under threat. Scientists estimate that by 2050, the oceans might be almost entirely bare of reefs.
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Key Facts In This Video
The Coral Triangle houses more than 500 species of coral and more than 3,000 species of fish. 00:41
The mineral-rich substrate of Lembeh Strait supports marine species that are rarely found anywhere else. 03:16
Sea squirts inhale water through a siphon, then filter out nutrients before expelling leftover water and waste. 06:09
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