FRANCIS CHEE / SCIENCE PHOTO LIBRARY FRANCIS CHEE / SCIENCE PHOTO LIBRARY
Microscope footage of planktonic embryos of the purple sea urchin (Strongylocentrotus purpuratus). The purple sea urchin is a scavenger that inhabits the rocky coasts of western North America. It is a model organism in biological research, and its genome was sequenced in 2006. Filmed with darkfield illumination.
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