Overfishing poses a threat to:

Overfishing poses a threat to all of the above.

• Fish populations: Overfishing can lead to the decline or collapse of fish populations. This can have a number of negative consequences, including the loss of food sources for other animals, the disruption of ecosystems, and the economic hardship of fishing communities.
• Aquatic biodiversity: Overfishing can also lead to the loss of aquatic biodiversity. This is because fish are often top predators in their ecosystems, and their removal can have a cascading effect on other species. For example, the removal of cod from the North Atlantic Ocean has led to the decline of other fish species, such as haddock and halibut.
• Livelihoods: Overfishing can also have a negative impact on livelihoods. This is because many people rely on fishing for their food and income. When fish populations decline, it can lead to job losses and economic hardship.

In conclusion, overfishing poses a serious threat to fish populations, aquatic biodiversity, and livelihoods. It is important to take steps to reduce overfishing and protect our oceans.