You searched for: “actinian”
actinian (noun), actinians (pl)
A sea anemone of the order Actiniaria: An actinian is a marine polyp that looks like a flower, but has oral rings of tentacles.
Actinians don't form hard skeletal structures.
This entry is located in the following unit: actino-, actin-, actini-, -actinal, actis- + (page 1)