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.
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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