The scientific name of Silver anchovy is Spratelloides gracilis. The body is thin and long, slightly in cylinder shape, flat on the front and back sides with silver vertical strips. The whole body length can be 10 centimeter long. It is a kind of fish from external ocean, and will close to the coast during reproduction period. The inshore of Penghu North Ocean area from the east of Chin Islet and Kupo Islet to Dangerous Reef is an important fishing land of Silver anchovy. Every year around Lunar March, mature female Silver anchovy will swing back to the area of Penghu North Ocean, reaching to an arenaceous sea area with seaweed growing there to spawn. The incubation period is about a month. In May, when the fish is a little bit bigger, people call it little Ding and it will become middle Ding in June and July, then big Ding in August. After fall, Silver anchovy swing out of Penghu sea area in groups again. Silver anchovy is one of the main fisheries in Chihkan. The rise and decline of Silver anchovy industry also influences the increase and decrease of the population of the whole village. Nowadays Silver anchovy industry is not as good as before. However, Chihkan fishing village is also the village that catches the biggest amount of Silver anchovy in Penghu.