Sea Urchins

Sea urchins are small, spiny marine animals found in oceans worldwide. They have a hard, round shell called a test, covered in sharp spines that help protect them from predators. Sea urchins play an important role in their ecosystems by grazing on algae, which helps maintain the balance of underwater environments. They have a unique feeding mechanism using small, tooth-like structures called Aristotle's lantern. Some species are edible and enjoyed in various cuisines, particularly in sushi. Overall, sea urchins are fascinating creatures crucial to ocean health and biodiversity.