Underwater image of live coral Montastraea annularis. Note polyp tissue (green) around the mouth and base of the tentacles and zooxanthellae (red fluorescence from chlorophyll) in the tissue between polyps. Tentacles also are visible.
The eye of a damselfly: The image reveals the regular, crystal-like hexagonal lattice of the eye’s elements. Igor Siwanowicz, Max Planck Institute for Neurobiology, Munich, Germany) (via: Olympus BioScapes Digital Imaging Competition)
Juvenile live bay scallop (Argopecten irradians) The blue spheres are eyes — scallops have up to 100 simple eyes strung around the edges of their mantles. Through research, scientists are trying to help restore scallop populations in Rhode Island.