This type of sea pen belongs to the suborder Subselliflorae, which contains species of sea pens that resemble antique quill-feather pens. (This species could belong to the genus Virgularia.) Sea pens are colonial marine cnidarians that are usually attached to the substrate, although they are able to transfer locations. They feed chiefly on plankton.
This slender sea pen was at a depth of about 15m, off the northern coast of Talikud Island. It stood about 20cm high.