Same thing with overfishing people fish way to much and nobody is doing nothing about it so if there keep doing this the little fish will start to get caught since the big fish already did and the little fish are still growing and when they grow up they make more fish to keep the fish population up but since the amount of people fishing they don't have time to grow and make more fish and people love eating fish it's really good food but if the fish population dies then you can eat fish but there is people that eat the fish a boatload of times in a week where you could make more sustainable and better options for eating instead of fish you could still have it but not live everyday since a ton of people eat fish in a day to stop this. The people need to stop using so much plastic since it goes into the ocean when you recycle it. Also there is so much micro plastic that is used for so much stuff and they could go into the ocean and people tried to help it to add filters to clean up the micro plastic but there to small to go in the filter and the fish think that its there food and that's bad since the toxins in the plastic eventually kills fish and then it remains in the ocean for the next sea creature to consume. That's another reason why the fish are dying. 

When people catch fish its effecting a lot of stuff and this is a thing thats going on right now we could all stop it if we can stop fishing or make laws to stop catching so much fish there is lots of other things that are about fish dying but the main one is for people that are fishing and we could try to get those people to stop since there is lots of fish also dying from other animals in the ocean since there the prey and the other animals are there predator and that even enough fish that die and with people killing more fish and then when people go to the beach they probably wont find fish since people are now catching fish by the beach since there is no more by the ocean or in the middle they could be trying to hide by the shallow area since not a lot of people fish at shallow the little fish are keep on dying now since there is not that much large fish and the smaller fish grow up and make more fish to make the fish population stay rised up and not go down but the tiny fish are dying and there might not be that much fish cause this is caused by over fishing.