He placed the starfish in a tank containing about 80 green sea urchins ... to feed on predatory sea stars had been hinted at before, with sea stars turning up in urchin stomach contents, says ...

frozen pebbles and dried-urchin “sand” that showcases the Norwegian green’s murky orange innards. Sloan provides the urchins, which the Danish have dubbed søpindsvin (sea hedgehogs).

The green sea urchin, Strongylocentrotus droebachiensis, lives on Maine’s rocky seafloor, and scrapes off algae with its rough mouthparts known as Aristotle’s lantern. This complicated mouth ...

The probable culprit is a disease-causing ciliate parasite that brings with it a fast death - perhaps the same one that has wreaked havoc on sea urchin populations in the Caribbean. In just two ...

Santa Barbara uni comes from the giant red sea urchin and is noted for its large size, coarse texture and brightly sweet flavor. Back east, Maine uni comes from longer-spiked green sea urchins.

South of Tampa Bay, in Florida, wedged between a quiet neighborhood and a mangrove forest, custom-designed aquariums are home to thousands of sea-urchin larvae ... with fuzzy green algae ...