The responsible fishermen avoided issues like this. They can still go fishing and make money without being worried about their future.
The overfishing activity helps students to understand the consequences of overfishing our lakes and oceans and how humans have to use resources in a smarter way.
We hope that at the end of the zoo experience, students will understand that humans are a part of an ecosystem where million of living things coexist. We may not understand how important they are but we know that our happiness depends on living in equilibrium with nature. Life can be better for everyone and as individuals we have the power to make this happen. Our descendants are dreaming of being grateful to us.