Akademik

corals forming featherlike colonies

: a gorgonian that branches in a plumelike form; especially : sea pen

any of several anthozoans of the order Gorgonacea, in which the colony assumes a featherlike shape.

[1615-25]

sea feather noun

A feathery alcyonarian, the sea pen

Main Entry: ↑sea

sea feather,

= sea pen. (Cf. ↑sea pen)