Lobsters are widely accepted as the key predator of sea urchins, and this information has informed management strategies in NSW to control exploding sea urchin numbers that threaten temperate reefs. Lobsters are widely accepted as the key predator of sea urchins, and this information has informed management strategies in NSW to control exploding sea urchin numbers that threaten temperate reefs. Plants & Animals Ecology Phys.org – latest science and technology news stories