Okay kiddo, imagine the ocean like a really big swimming pool filled with lots and lots of fish of different shapes, colors, and sizes. These fish are all swimming around, eating different things like seaweed, plankton, and other fish.
Now, imagine that some people want to catch these fish so they can sell them to other people to eat. These people are called fishermen, and they use special tools like nets, lines with hooks, and traps called pots to catch the fish.
However, there are so many fishermen trying to catch fish that sometimes they catch more fish than they need or than the fish can reproduce. This is called overfishing, and it can be harmful to the fish population and the environment. It's like picking all the flowers from a garden, and then there are no more flowers left to grow the next year.
To prevent this from happening, there are special rules and regulations in place called fishing quotas. These tell the fishermen how many fish they are allowed to catch and when they can catch them. This helps keep the fish population healthy and sustainable for future generations.
So, in summary, ocean fisheries are places where fishermen go to catch fish to sell to other people to eat. To keep the fish population healthy, there are rules that limit how much fish can be caught at a time.