five parts of fish brain
软骨鱼（cartilaginous fish）： 软骨鱼的脑比较复杂。比如，鲨鱼的脑比七鳃鳗的脑大得多并且发达。脑已经明显分化为五个部分。 Cartilaginous fish brain more complex .For example, the shark's brain than lamprey brain is much larger and developed. The brain has been clearly divided into five parts.
软骨鱼（cartilaginous fish）：
硬骨鱼（Teleost fish）： 硬骨鱼与软骨鱼的脑相似，但是简单得多 Teleost fish with cartilaginous fish brain is similar, but much simpler 据测定，鳗鲡的脑仅占体重的1/2000。 According to the determination of eel brain weight is only 1/2000.
Telencephalon 端脑 Diencephalon 间脑 Mesencephalon 中脑 Cerebellum 小脑 medulla oblongata 延脑
Telencephalon 端脑
截锥型 球型 柱型 双球型 膨大形 花朵型 不对称型
Mesencephalon 中脑 图7 图8 双球型（7A，B） 后突型（7C，D） 哑铃型（7E） 分离型（8A，B） 前突型（8Ｃ，Ｄ） 短柱型（８Ｅ）
Diencephalon 间脑
medulla oblongata 延脑 Cerebellum 小脑
The relationship between brain morphology and ecology 脑的形态与与生态的关系 The relationship between brain morphology and ecology 早在许多年前，科学家研究了鱼的生活方式的特点与脑的构造的关系 Many years ago, scientists studied the relationship between the characteristics of the way of life and the structure of the brain 一些来自山东海洋学院的专家研究了１５２种鱼脑后得出结论，认为两者关系十分密切 Some experts from Shandong Institute of marine research concluded that 152 kinds of fish head, They think they are closely related
The relationship between brain morphology and ecology 脑的形态与与生态的关系 The relationship between brain morphology and ecology 那是因为鱼脑各部分分别掌管不同生理功能 That's because each part of the brain is responsible for different physiological functions 端脑是嗅觉中枢，中脑是视觉中枢，间脑与内分泌有关并影响色素变化，小脑维持身体平衡，而延脑是味觉中枢、听觉中枢、触觉中枢、及侧线感觉中枢等
从脑的不同位部的发达程度与鱼的生态环境可以看出以下关系 From the development of different parts of the brain and the ecological environment of fish can be seen as follows
脑的形态与与生态的关系 The relationship between brain morphology and ecology
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