What is the environmental impact of over-fishing oyster and crabs?

Over-fishing oysters and crabs significantly disrupts marine ecosystems, leading to imbalances in species populations and reductions in biodiversity. Oysters, for example, play a crucial role in water filtration and habitat creation, and their depletion can result in poor water quality and loss of habitat for other marine organisms. Additionally, the decline in crab populations can affect the food web, as they serve as prey for various fish and birds. Overall, the unsustainable harvesting practices not only threaten these species but also compromise the health of the entire marine environment.