ESCI 501 Introduction to Oceanography. I need some points to do the introduction overfishing power point

The course is Introduction to oceanography. I am writing the Power Point the topic is overfishing, can you provide some points to me. I am doing the introduction part, like what is overfishing, and some data. I want to know can I connect it with the zooplankton? or the phytoplankton? or there are other topic I can focus on except the environment effect, human effect, those topics cover by my teammate.