What do kina eat?

Kina are sea urchins, and their diet primarily consists of algae and other organic matter found on the seafloor. They use their long, spiny spines to move around and collect food. Their diet includes various types of algae, such as kelp, sea lettuce, and diatoms. Kina also feed on small invertebrates, including crustaceans, worms, and mollusks, which they scrape off rocks or other surfaces using their specialized mouthparts called Aristotle's lantern. Sea urchins play a crucial role in maintaining the balance of marine ecosystems by grazing on algae and controlling its growth, which prevents the overgrowth of certain species and promotes the health and diversity of underwater habitats.