Pigment spot ocellus The pigment spot ocellus is an ocellus that contains only part of its cells pigmented. It is characteristic of jellyfish, sea stars, and flatworms.[1] References[edit] ^ "Eye (invertebrate)" McGraw-Hill Encyclopedia of Science & Technology, vol. 6, p.790 2007 This article about anatomy of the phylum Cnidaria is a stub. You can help Wikipedia by expanding it.vte This article about anatomy of the phylum Echinodermata is a stub. You can help Wikipedia by expanding it.vte This flatworm- (or platyhelminth-) related article is a stub. You can help Wikipedia by expanding it.vte This biology article is a stub. You can help Wikipedia by expanding it.vte