Final answer:
The purpose of this passage is to inform readers about the negative impacts of human activities on ocean ecosystems and resources.
Step-by-step explanation:
The purpose of this passage is to inform readers about the negative impacts of human activities on ocean ecosystems and resources. It discusses the depletion of fish populations, the destruction of habitat, pollution, and other factors that put marine species at risk of extinction. The passage serves as a call to action to protect and conserve the oceans.