Scyllaea \Scyl*l[ae]"a\, n. [NL. See {Scylla}.] (Zo["o]l.)
A genus of oceanic nudibranchiate mollusks having the small
branched gills situated on the upper side of four fleshy
lateral lobes, and on the median caudal crest.
Note: In color and form these mollusks closely imitate the
fronds of sargassum and other floathing seaweeds among
which they live.