Surprising find in deep corals

Scientists at the Hawai’i Institute of Marine Biology (HIMB) examined 14 black coral species collected between 10 and 396 meters around Hawai’i. Surprisingly 71% of the species examined were found to contain photosynthetic algae, even at depths approaching 400 meters. The penetration of sunlight at depths over 100 meters is extremely poor. The question therefore is what are these algae doing down there?

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