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Coral Sand Under a Microscope

Coral Sand
(David Maitland / Nikon Small World)

Coral sand is aptly named: it's sand made up of tiny bits of coral and other ocean animals such as foraminifera, molluscs, and crustaceans. This image, taken at 100x zoom, took 18th place in the 2012 Nikon Small World photomicrography competition.