Shrimp aquaculture From the objectivity of space the earth is overwhelmingly composed of water.
Land appears almost as an after thought.
The Blue Planet is 70 per cent water, all but three per cent of it salt water. Life on earth first evolved in the primordial soup of ancient seas, and though today's seas provide 99 per cent of all living space on the planet, we know more about space than we do about oceanus , the world ocean. Part of the problem is the sheer vastness of our watery world. The Pacific Ocean covers 181 million square kilometres, an area twice the size of the former Soviet Union. And its average depth is 4,000 metres.