blue coral
Azure marine cnidarian
Blue coral is a colonial marine animal found in tropical Indo-Pacific waters, distinguished by its blue skeleton—unusual among corals, which typically have white calcium carbonate skeletons.
Despite its name and appearance, blue coral is more closely related to soft corals than to the hard reef-building corals it resembles.
The skeleton is sometimes used in jewelry.
- reefUnderwater rock or coral formation
- oceanMassive saltwater body
- tropical watersSeas near the equator
- turquoiseBlue-green opaque gemstone
- living fossilOrganism unchanged since prehistory
skeleton · tropical · polyps · marine · marine biology · aquarium · indigo · cerulean · lagoon · underwater · ocean floor · endangered · calcified · Pacific · diving · colonial · azure · seabed
skeletal composition
blue coralsoft coral
Flexible reef-building invertebrate
sea fan · tree coral · sea pen · stony coral
blue, blues, blued, blueing, bluing, bluish, blueness, bluer, bluest