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淡水鲨鱼又称巴丁鱼或八珍鱼,主要分布在东南亚一带,为近年新引进的淡水优良品种。 一、生物学特征 1、体型与体色。体色有黑、白、灰、红四种。前三种体色的鲨鱼多作为食用鱼饲养,尤其是灰鲨鱼最受欢迎,其背部青色,体侧青灰色,腹部银白色;红鲨鱼即水晶巴丁鱼,多作观赏鱼饲养。 2、适应性与食性。淡水鲨鱼耐低氧能力强,适应性广,但抗低温能力较弱。适温20～34℃,最佳生长水
Freshwater sharks, also known as barbados or crayfish, are mainly distributed in Southeast Asia. They are the new breeds of freshwater introduced in recent years. First, the biological characteristics 1, body size and body color. Body color is black, white, gray, red four. The first three kinds of body color sharks are mostly used as food fish, especially gray sharks most popular, the back of the green, body-side gray, abdomen silver white; red sharks crystal that is, butcher fish, and more for ornamental fish feeding. 2, adaptability and diet. Freshwater shark hypoxia tolerance, wide adaptability, but the ability of low temperature resistance is weak. Suitable temperature 20 ~ 34 ℃, the best growth of water