octocorallian
/ˌɒktə(ʊ)kɒˈralɪən/Zoology
noun
A coral of the subclass Octocorallia, distinguished by having polyps with eight tentacles; an alcyonarian.
adjective
Of, relating to, or designating corals of the subclass Octocorallia.
Origin
1930s; earliest use found in Science. From scientific Latin Octocorallia, subclass name + -an.