Conservation of ocean means rational uses of ocean resources. So that a harmony between man’s ocean resource requirements and their availability could be maintained. The rational uses of ocean resources by the present generation and the preservation of ocean resources for the future generations, is known as conservation of ocean. It also means the protection of oceans and ocean resources against pollution caused by dumping of oceans and of industrial, agricultural and municipal wastes into oceans by man, oil spill from oil tankers, and nuclear explosions in sea and oceans.

Need for conservation of Oceans: There is a need for conservation of oceans due to the following reasons:

• If oceans are not conserved, all the living organism in the oceans either die or become unsuitable for human consumption. 
• Oceans are the storehouse of pearls, corals and sponges. These resources have to be conserved. 
• Oceans have oil and natural gas reserves. These reserves have to be conserved. 
• Oceans are rich in minerals. These mineral resources have to be rationally exploited. 
• Oceans allow the growth of innumerable species of plants. These plants have to be conserved. 
• Oceans are the breeding centers of marine fisheries. Thousands of fishes are found in oceans. The marine fishery resources should be exploited rationally. 
• Literacy and education programmes on marine features must be initiated and promoted. 
• Proper law to be enacted to save sea and ocean.

World wise awareness programme must be arranged to show the pro and cons of the marine pollution etc.