SPINY WONDERS: Volume 17, Number 2
Researchers show the eyes of Linckia laevigata help it stay near its reef.
These Red Sea Urchins are animals. Not a surprise! :). However, when abundant the urchins also become a substrate. And when their total surface area is calculated, it becomes apparent they can actually create a considerable area.
Are the reports of mass mortality of sea stars in the Pacific Northwest harbingers of ecosystem collapse? The loss of keystone predators is never a good thing.