sea pensea pen
any of an order (Pennatulacea) of mud-dwelling anthozoans that form feather-shaped colonies
Origin of sea penfrom a fancied resemblance to a quill pen
Any of various corals of the order Pennatulacea, having a flexible skeleton in the form of a long central shaft with numerous branches on each side.
Origin of sea penFrom its resemblance to a quill pen.
From the feather-like appearance of some species, reminiscent of antique quill pens.