Colonial coral species rely upon symbiosis with photosynthetic algae, which collapsed due to the events surrounding the K Pg boundary.
2.
The Petoskey stones, a type of fossil colonial coral dating back to the Devonian era, was later discovered on his land.
3.
The Petoskey stones, a type of fossil colonial coral dating back to the Devonian period, was later discovered on his land.
4.
It is a large polyp, colonial coral and grows under overhangs and in caves as part of an assemblage of organisms suited to these poorly-lit sites.
5.
"' Coenothecalia "'( also known as Helioporacea ) is an order of the subclass Octocorallia that forms massive lobed crystalline calcareous skeletons in colonial corals.