In New South Wales, barrens can form in areas where there is an overrepresentation of long-spined sea urchins. It's assumed that large fish—believed to be a key predator of urchins—play a significant ...

Inside the spiky test are five corals of roe, sometimes called tongues—the sea urchin’s wobbly gonads. Karoline O.A. Pettersen Sea urchins with their skin and spines removed. Jennifer Steen ...

while other sea urchin species were present in 30%. Similarly, pink snapper consumed very few long-spined urchins (2.7% of fish), yet other urchins were present in 13%. "This tells us it's likely ...