It is often quite simple as humans. We are very capable hunters, with our ability to make ourselves tools and similar. This, unfortunately, means that we do not obey the normal rules for predator and prey.
With an animal like a lion, they move into an area, and their population finds a level with local food. This way, the lion can continue to live their long-term; both the lion and the antelope that they eat, are not facing extinction.
We do not work the same way. When in a market economy, a supplier finds a resource which sells well, they will keep selling it, until there is nothing left. The poaching of white rhino in South Africa reduced the population of the animal by 66% in must 10 years. It was not a reducing population, but increasing anti poaching which finally bought this under control.
Sharks are similar. lying at the top of the food chain. This means that if we operate as we currently are, eating sharks from the top of the food chain, we will have a huge impact on other species further down the food chain.
This is already being seen, in oceans all over the world. Predators kept in check by animals like the mako shark, have population explosions, and this in turn decimates the population of species further down the food chain.
THIS MUST CHANGE