While they are very similar to Green sea urchins (Bafun uni), Short-spined sea urchins (Ezobafun uni) are a size larger and have thick spines.
Green sea urchins are 5cm in diameter and Short-spined sea urchins are 10cm in diameter. Green sea urchins are distributed from the southern areas of Hokkaido down to Kyushu. Short-spined sea urchins are mainly distributed in the Hokkaido and Tohoku areas. The most commonly eaten green sea urchins that are Short-spined sea urchins in Japan.
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Revision date: October 15, 2018