前言热带鱼分布广品种多,千姿百态,美丽奇特,令人喜爱。它们的生活习性、食性、个性和繁殖特性等比较复杂,却也存在着共同的特性,即对温度的要求严格,一般需要20℃以上的水温。由于世界各地长期移植驯化的结果,不少品种热带鱼已有不同程度的适应能力,但有些方面仍保持着固有的特点,如对水温、温差的承受极限,对水质、饲料的 Preface tropical fish are widely distributed varieties, in different poses and strange expressions, beautiful and unique, very cute. Their living habits, diet, personality and reproductive characteristics are more complex, but there are also common characteristics, that is, the strict requirements of temperature, generally require more than 20 ℃ water temperature. Due to the long-term transplanting and domestication results around the world, many varieties of tropical fish have different degrees of adaptability, but some aspects still maintain the inherent characteristics, such as water temperature, temperature tolerance limit, water quality, feed