If you were to drop a toaster connected to the mains (electrical outlet) into the ocean, it would most likely cause a short circuit and cut off power, preventing any potential electrocution of fish or other marine life. However, I strongly advise against attempting this or engaging in any activity that could be dangerous or harmful to the environment.
Electrical appliances like toasters are not designed to be used in or around water, and dropping one into the ocean could lead to serious consequences, including damage to the device, personal injury, and environmental pollution. Moreover, disposing of electronic waste inappropriately can harm marine life and contribute to pollution of the oceans.
If you encounter a situation where an electrical appliance ends up in water accidentally, it is essential to prioritize safety and avoid touching the appliance or the water around it. In case of electrical accidents near water, always seek professional assistance to ensure safety and prevent any potential harm to yourself and the environment.