There are many species of organisms living in the ocean, with a total of more than 200,000 species. Among these organisms, there are about 100,000 species of marine plants and about 160,000 species of marine animals.
There are many species of marine plants, from simple lower plants to complex higher plants, which form the basis of the marine ecosystem. There are also many species of marine animals, from herbivorous animals to carnivorous animals, which play different roles in the marine food chain.
In addition, there are a large number of microorganisms in the ocean, which play a vital role in maintaining the balance of marine ecology. Marine biological resources have huge potential. It is estimated that the annual production of marine plankton (calculated in fresh weight) in the world reaches 500 billion tons. Without excessively destroying the ecological balance, the ocean can provide humans with enough aquatic products for 30 billion people every year. This makes the ocean an extremely attractive future food bank, providing humans with huge potential resources.