Hexacorallia is often a misspelling of hexacoral.
Hexacorallia has no English definition.
As a noun hexacoral is
any of the subclass Hexacorallia of water-based organisms formed of colonial polyps generally with sixfold symmetry.
hexacorallia
Not English
Hexacorallia has no English definition. It may be misspelled.
hexacoral
English
Noun
(
en noun)
(zoology) Any of the subclass Hexacorallia of water-based organisms formed of colonial polyps generally with sixfold symmetry.