What is the common shape of an anode used in electrofishing?

The common shape of an anode used in electrofishing is spherical. This design is favored because it helps to create a uniform electric field, which is essential for effectively attracting and immobilizing fish. The spherical shape allows for better distribution of electric current in the surrounding water, making it more efficient in reaching fish from various angles and distances. This increase in effective coverage is crucial for maximizing capture rates and ensuring that the electrical field is consistent across the fishing area.

The other shapes, while they can be used in various applications, do not provide the same level of electric field uniformity and effectiveness as the spherical design in the context of electrofishing.