Blue coral - Wikipedia | Blue coral

Blue Coral – Rare, Beautiful & Fascinating: 100 Years @FloridaMuseum | Stony corals produce a white calcium carbonite skeleton, while Blue Corals have a unique pigment in their skeletons that gives them a deep blue color. Blue Corals have changed little over millions of years. Summary Blue Coral (Heliopora caerulea) From Pacific Ocean, mid-20th century | Blue Coral