Sea urchins have no brains or hearts. But put them in the proximity of the unmistakable sunflower sea star, and somewhere in their pin cushion-like body, they sense trouble. That’s the main finding of a new study by ecologists and undergraduates at the University of California, Santa Cruz, who wanted to see if this particular type of sea star would deter urchins from eating kelp.
Students discover sunflower sea stars keep kelp-hungry urchins at bay
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