一望无际的海洋,那汹涌澎湃的无边巨浪令人生畏。海洋,占地球面积的71%,是生物圈的主体,在浩瀚的海洋中生活有20多万种生物。海水中的生物有的硕大无比,如有些巨藻最长可达500米;动物中的蓝鲸,体长可达30米,质量达170吨,一天要吃4吨食物,是世界上最大的哺乳动物。有的十分微小,如单细胞的浮游生物,体长只有几千分之一厘米。别看这些浮游生物很小,但是它们的量却特别巨大,得用亿万吨计算,是海洋生态系统的基础,名副 The boundless ocean is so daunting that its boundless waves are endless. The ocean, which accounts for 71% of the Earth’s area, is the main body of the biosphere and has more than 200,000 species of living creatures in the vast ocean. The creatures in seawater are extremely large. For example, some giant algae can reach 500 meters in length. The blue whale in animals can reach 30 meters in length and 170 tons in quality. It can eat 4 tons of food a day. It is the largest in the world. mammal. Some are very small, such as single-celled plankton, which is only a few thousandths of a centimeter in length. Although these plankton are small, they are extremely large and must be calculated in billions of tons. They are the basis of the marine ecosystem.