https://www.sciencenews.org/article/great-barrier-reef-coral-muga-dhambi-resilience-size
A coral the size of a carousel is the widest known in the Great Barrier Reef.
Found just off the coast of Goolboodi Island in Northeast Australia, this reef-building Porites measures 10.4 meters in diameter — earning it the nickname Muga dhambi, or “big coral,” from the Indigenous custodians