20 articles. The weight of Siniperca chuatsi fry is about 25 grams when it is 5 cm, and 20 pieces add up to one catty. Siniperca chuatsi, also known as osmanthus fish and seasonal flower fish, is a freshwater fish of the genus Siniperca. Siniperca chuatsi is about 28 cm long, with a spindle-shaped body, a tall body, a flat side, a bulging back, a big head, an inclined mouth crack, a protruding jaw, a canine-shaped small tooth in the front of the upper and lower jaws, and a serrated rear edge of the anterior branchial lid. Siniperca chuatsi has small round scales, long dorsal fin, yellow-green back, yellow-white abdomen, and irregular brown stripes and patches on both sides.