Nerea Lesson, 1831 Scyllaea is a genus of nudibranchs.

They are marine gastropod molluscs in the family Scyllaeidae.

[1] The slugs live on floating algae like Sargassum, where they have the same color and shape as the alga and can hardly be seen by predators.

They feed on hydrozoa growing on the alga.

[2] Species in the genus Scyllaea include