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海胆是一种棘皮动物,其种类数以百计。绝大多数海胆都不能食用,只有少数正形海胆可供食用,这少数正形海胆一般都是大型的。日本人最嗜食海胆卵,他们认为海胆卵的营养价值最高,是最佳的海味。日本人最喜欢吃鲜活海胆,因而鲜活海胆的售价也最为昂贵。1987年5月28日大坂市场上北海道产的海胆售价竟达3万日元/千克。按当时汇率计算,每千克海胆的售价在200美元左右,折合人民币750元左右。在北海道壳径5～7厘米的鲜活海胆,每个售价竟达2000日元。合人民币50多元。
Sea urchin is an echinoderm, hundreds of its species. The vast majority of sea urchins are not edible, only a small number of positive sea urchins are available for consumption, this is a small number of positive sea urchins are generally large. Japanese most eater sea urchin eggs, they think the highest nutritional value of sea urchin eggs, is the best seafood. Japanese favorite live fresh sea urchin, so the price of fresh sea urchin is also the most expensive. On May 28, 1987, the price of sea urchin produced in Hokkaido on the Osaka market was as high as 30,000 yen / kg. At the prevailing exchange rate, the price per kilogram of sea urchin is about 200 US dollars, equivalent to about 750 yuan. In Hokkaido shell diameter of 5 to 7 cm of fresh sea urchin, each price actually amounted to 2,000 yen. Together for more than 50 yuan.