description Black Sea Urchin Overview
The black sea urchin, Arbacia lixula, is a dark-spined echinoderm found in the Mediterranean Sea and parts of the eastern Atlantic. It lives mainly on shallow rocky coasts, where it grazes algae from hard surfaces with its mouthparts. Because this feeding affects the amount of algal cover on the seafloor, the species is relevant to studies of Mediterranean rocky-shore ecology and herbivore communities.
help Black Sea Urchin FAQ
What species is commonly called the black sea urchin in the Mediterranean?
The Mediterranean black sea urchin is commonly identified as Arbacia lixula. It is flatter and darker than the edible sea urchin Paracentrotus lividus.
What does the black sea urchin eat?
It is primarily a grazing herbivore that feeds on algae growing on rocky seabeds. Its grazing can keep algal growth from becoming excessive, although very dense urchin populations can also create bare rocky areas.
How can you distinguish a black sea urchin from an edible sea urchin?
The black sea urchin is typically flatter, uniformly black, and has thinner spines. It also lacks the same type of tube-foot suckers found on the edible species.
Is the black sea urchin safe to eat?
It is generally described as non-edible, unlike the Mediterranean edible sea urchin Paracentrotus lividus. The two species can occupy similar coastal habitats but should not be treated as interchangeable.
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