海洋能具有如下特点：
1.海洋能在海洋总水体中的蕴藏量巨大,而单位体积、单位面积、单位长度所拥有的能量较小.这就是说,要想得到大能量,就得从大量的海水中获得.
2.海洋能具有可再生性.海洋能来源于太阳辐射能与天体间的万有引力,只要太阳、月球等天体与地球共存,这种能源就会再生,就会取之不尽,用之不竭.
3.海洋能有较稳定与不稳定能源之分.较稳定的为温度差能、盐度差能和海流能.不稳定能源分为变化有规律与变化无规律两种.属于不稳定但变化有规律的有潮汐能与潮流能.人们根据潮汐潮流变化规律,编制出各地逐日逐时的潮汐与潮流预报,预测未来各个时间的潮汐大小与潮流强弱.潮汐电站与潮流电站可根据预报表安排发电运行.既不稳定又无规律的是波浪能.
4.海洋能属于清洁能源,也就是海洋能一旦开发后,其本身对环境污染影响很小.
OEs have the following features：
1.OEs have large storage in the total water in the ocean,however,the energy contained in per volume,per area,and per length is low.This is to say,large energy only can be obtained from large volume of oceanic water.
2.OE has renewability.It derives from solar radiation and gravitation between celestial bodies such as the sun,the moon,therefore,OE is renewable and inexhaustible as long as the celestial bodies coexsist with the earth.
3.OEs can be divided into relative stable energies and instable energies.The former include temperature difference energy,salinity gradient energy,and ocean flow energy,while the latter also can be subdivided into two groups as regular instable energies (eg.tidal energy and tidal current energy) and irregular energies (eg.wave energy).People can compile timeto-time and day-by-day tide and ocean flow prediction everywhere to predict tide scale and ocean flow according to tide and ocean flow dynamics（可选词汇:fluctuations,changing rules）.Tidal power stations and ocean flow power stations may arrange for their generations according to the prediction.
4.OEs belong to clean energies,that is to say,they cause almost none environmental pollution once belong exploered （可替换词汇是developed,但是这里我觉得用给出的比较好）.