What are 2 examples of conservation efforts in the marine environment?

Marine conversation is a structured plan in the protection and preservation of oceans ecosystem and seas.

Example of conversation method is,

Marine protected areas are areas protected to limit human activities. Some places are permanently closed while some are zoned into various categories.

Sustainable fisheries this is also done to conserve fishes in the ocean to avoid a continuous decline in population. It is done using theoretical approach and practical approach.