What happens if jellyfish go extinct?

If jellyfish go extinct, it could disrupt marine ecosystems significantly, as they play a crucial role in the food web. Many species, including sea turtles and certain fish, rely on jellyfish as a food source. Their absence could lead to overpopulation of other species, resulting in imbalances in marine biodiversity. Additionally, jellyfish contribute to nutrient cycling in oceans, so their extinction could affect nutrient dynamics and overall ocean health.