Coral Reefs 101 | National Geographic
Why the open web links it
Explains what coral reefs are, how they form, and the threats they face from warming ocean waters.
Linked by 22 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including okstate.edu, libretexts.org, icriforum.org, alieward.com, outforia.com.