Heilongjiang. Spring fish are widely distributed in the North Atlantic and the western Pacific coast. Russia, Japan, Canada, Norway and other places are the main producing areas of spring fish. They are distributed in China from the lower reaches of Heilongjiang and Tumen River to the coast of Taiwan Province. However, the number of spring fish has dropped sharply due to indiscriminate fishing. Most of the spring fish sold in the market are caught in Canada and Norway. The nutritional value of spring fish is very high. The fish roe contains trace elements, mineral salts and protein needed by the skin.