Stunning microscopic footage has captured the moment a translucent baby sea urchin crawled across a bed of red algae. The video earned fifth place in the annual Nikon Small World in Motion competition ...

Beneath sea urchins’ exterior spines, rounded skeletons called tests are jewels of color, texture, and symmetry. There are hundreds of urchin species, and they’re found in every ocean on Earth, from ...

The sea urchin has long stood as an exemplary model for investigating embryogenesis and the intricate gene regulatory networks (GRNs) that dictate developmental processes. Studies in this field have ...