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The original was posted on /r/science by /u/MistWeaver80 on 2024-10-23 20:48:20+00:00.

Original Title: Early evidence of symbiosis found in ancient coral. The symbiotic relationship between corals and their photosynthetic algal partners (photosymbionts – which recycle nutrients and are important for corals living in nutrient-poor waters) goes back to at least the Devonian, 385 million years ago.