推荐回答（3个）
食物以螺蛳、蚌、蚬、蛤等为主，亦捕食虾和昆虫幼虫。在鱼苗阶段，则主要以浮游动物为食。青鱼生长迅速，个体较大，成鱼最大的最大个体可达70千克。
多集中在食物丰富的江河弯道和沿江湖泊中摄食肥育，在深水处越冬。行动有力，不易捕捉。耗氧状况与草鱼接近，水中溶氧量低于1.6毫克/升时呼吸受到抑制，低至0.6毫克/升时开始窒息死亡。在0.5～40℃水温范围内都能存活。
繁殖与生长的最适温度为22～28℃。喜微碱性清瘦水质。主要摄食螺、蚬、幼蚌等贝类，兼食少量水生昆虫和节肢动物。日摄食量通常为体重的40%左右，环境条件适宜时可达60～70%。
扩展资料：
青鱼体色青黑，鳍呈灰黑色，故叫青鱼。青鱼性情刚强，力气很大。青鱼喜欢在水的底层生活，它们常在江河或池塘的底部沉伏，轻易不会到浅水处游动。
中国历来将青鱼与鲢、鳙和草鱼等混养，成为中国池塘养鱼的主要方式。由于主要摄食螺类，有限的饵料资源影响了青鱼养殖的发展。现采用人工配合饵料已获初步成效。
青鱼：有补气养胃、化湿利水、祛风解烦等功效。食用可治疗气虚乏力，胃寒冷痛、脚气、湿痹、疟疾、头痛等症。青鱼所含锌、硒、铁等微量元素，还有防癌抗癌作用。
参考资料来源：百度百科--青鱼
参考资料来源：人民网--盘点常见6类鱼的药用价值
青鱼是近底层鱼类，与鲤鱼接近同层偏上。大多生活在中下层极少上浮到水面。为肉食性鱼类主食螺蛳、蚬子也食藻类、水生植物。人工饲养大都以豆饼、豆渣、各种糟为主。
野环境中的青鱼，大都生活在江湖河泊和水库中，北京水域比较少。大多为人工饲养。
钓具的选择
青鱼为大型鱼类，因此野钓青鱼时最好再置备一付钓竿备用，以防钓到大青鱼时，以备在鱼线即将被拉完时，换上另一付海竿。
为此垂钓青鱼时，应选用3.6米以上硬调海竿，钓轮也应选用大型轮，储线应在200米以上，线径应在0.45～0.5毫米。如使用二用竿，竿长在5米以上为好。
钓钩
青鱼
可用单钩、双钩选用大型短柄钩如伊势尼11～12号或鲤17～18号钩。若用组钩则
可选伊势尼516和丸袖形。而在池溏垂钓，则选用5--6米中硬手竿，线
0.3～0.35，钩丸袖形716号足可应对。
钓饲选择
青鱼最喜食田螺、蚬、幼蚌、小虾、蚯蚓，但最喜食田螺。也吃玉米面制品和煮熟山芋。以田螺肉为最佳钓饵，p1.将田螺去皮一个个穿在钩上，装满为止。p2.将田螺砸碎装钩。
钓点选择
青鱼大都生活在中底层，喜有泥底水域觅食。因此在螺蛳多的水域都可作为钓点。在挺水植物附近水底有砾石，都是不错位置。每当夏秋二季也常到浅水处觅食，尤其在清晨和傍晚、常可看到觅食泛起的泡沫，也是不错的钓点。
祝生活愉快，望采纳，谢谢
以摄食螺蛳、蚬、幼蚌为主要食物,并吃虾及水生昆虫。
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