title: Optics: Armed for light sensing.
authors.forename: R
authors.initials: R
authors.lastname: Sambles
mesh_terms: D000818:Animals; D002119:Calcium Carbonate / Q000378:metabolism*; D004447:Echinodermata / Q000502:physiology*; D008027:Light; D055095:Optics and Photonics; D012679:Sense Organs
chemical_list: D002119:Calcium Carbonate