1, spring fish, native to the deep sea of Japan, is named "spring fish" because there are fish eggs in its belly all year round, also known as "hairy scale fish" and "cucurbit fish". Although the spring fish is not big, its meat is particularly tender and smooth. A small fish with many eggs is named "Duochun" because there are many roes in its female belly.

2. Spring fish has a transparent olive green back, silvery sides and silvery belly, which are mainly distributed in the North Atlantic Ocean and the Arctic Ocean. In the eastern part of the Atlantic Ocean, it is mainly distributed in Iceland, Barents Sea and northern Norway. In the western part of the Atlantic Ocean, it is mainly distributed in the southwestern part of Greenland, the northern part of Labrador extends to Newfoundland and the St. Lawrence River, and it is distributed in the eastern part of the North Pacific Ocean, the northern waters of South Korea and Japan.