Fishing can cause changes in aquatic ecosystems by affecting the balance of different species. Researchers used a complex model to study how fishing impacts food webs. They found that different fishing strategies can trigger changes in the abundance and variety of species in the ecosystem. Removing certain types of fish can lead to fluctuations in the population sizes of other species, which can impact the overall stability of the ecosystem. This study shows that fishing can have ripple effects throughout the food web, not just on the species being directly targeted.