Sea urchins are prickly "hedgehogs of the sea" that exist in every ocean around the globe. You might have seen their spines peeking out of the water during low tide - or even stepped on one while ...

Despite their consumption of the largest urchins, the sea otters alone could not control urchin populations. Sunflower stars play an integral role in these kelp forest communities by preying upon ...

Warming sea water has triggered an ... But even without these in place the Otter Force One can still be used by human divers to improve their urchin-gathering efficiency.