Sea urchins see with their feet

Sea urchins lack eyes, but can see with their tentacle-like tube feet instead, previous research has indicated. Now, researchers at Lund University in Sweden have tested their vision in a new study, and shown that while sea ...

Human impact on sea urchin abundance

Sea urchin populations are more sensitive to human activities than previously believed, according to a half-century observational study. Researchers found that changing water temperature and algal blooms strongly affected ...

Sea urchins erode rock reefs, excavate pits for themselves

Through their grazing activity, sea urchins excavate rock and form the pits they occupy. This activity may cause significant bioerosion of temperate reefs, according to a study published February 21, 2018 in the open-access ...

Making spines from sea water

Some sea creatures cover themselves with hard shells and spines, while vertebrates build skeletons out of the same minerals. How do these animals get the calcium they need to build these strong mineral structures? Professors ...

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