sea pen

I read that Washington State’s Lummi tribe and other animal activists have unsuccessfully petitioned to move her to a sea pen, where she could be in acoustic contact with her mother and siblings, who still live in the wild.

Each sea-pen is a colony of Alcyonarians, and the name is due to the singular arrangement of the individuals upon the common stem.

I will only mention one other animal, a zoophyte (I believe Virgularia Patagonica), a kind of sea-pen.

Mr. Darwin's description of a kind of Sea-pen, Virgularia Patagonia, throws some curious light on the habits of these creatures.