The taste of omnivorous sea urchins, what they eat and grow on is important! Rishiri sea urchins that eat and grow on high-quality and abundant Rishiri kelp have a high taste evaluation and are popular. On the other hand, sea urchins are creatures that are easy to catch and prone to fluctuations in resource volume. On the island, various restrictions are decided, and efforts are being made to obtain a stable catch. Efforts are also being put into aquaculture, and what becomes its base is the Sea Urchin Seedling Production Center. After collecting parent sea urchins, collecting eggs and fertilizing them, they raise the baby sea urchins until they are a size that can be released into the sea, and are releasing them to the island's coast. Because kelp is used as food, releases are carried out considering the balance between sea urchins and kelp so that kelp does not become depleted, and checking of the growth status after release, and extermination of sea urchin's natural enemy starfish, etc., are also being carried out.

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