海洋中由于海水温度、盐度分布的不均匀而产生的海水密度和压力梯度，或由于海面上风的作用等原因产生的海水大规模的方向基本稳定的流动，称为海流。海流所具有的动能称为海流能。海流的能量与流速的平方和流量成正比，因流量为流速和过流面积的乘积，故也可以说海流的能量与流速的立方成正比。
能海流发电装置 Marine Current Turbine Generator
If we can make use of daily continuous Current energy, it will be the most realistic way to improve their living conditions.
如能利用每天持续不断的海流能提供电能和制备淡水所需的能量,对于改善那里的生活条件不失为一种最现实的办法。
参考来源 - 海流能发电及模拟装置的研制·2,447,543篇论文数据，部分数据来源于NoteExpress
本文给出了我国各类海洋能资源（潮汐、波浪、潮流、温差、盐差和海流能）蕴藏量粗略的估算结果。
The estimated reserves of various ocean energy sources in our country, such as tide, wave, current, tidal current, ocean thermal energy and salinity gradient energy are given in this paper.
广义的水能资源包括河流水能、潮汐水能、波浪能、海流能等能量资源；狭义的水能资源指河流的水能资源。
Generalized water resources include river water, tidal water, wave energy, ocean current energy and other energy resources; the narrow sense refers to the river water resources, water resources.
上涌的海流也能从海洋深处带来奇异的能发光的生物。
The upwelling of currents can also bring to light exotic creatures from the deep.
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