A more thorough explanation:

A free fishery is an exclusive right to fish in public water, such as a river or an arm of the sea. This right exists by grant or prescription from the monarch. It is also known as libera piscaria.

For example, if a person has a free fishery right, they can fish in a river without any interference from others. This right is granted by the monarch and is exclusive to the person who has it.

Another type of fishery right is the right of fishery. This is the right of persons to fish in public waters, subject to federal and state restrictions and regulations, such as fishing seasons, licensing, and catch limits.

For example, if a person has the right of fishery, they can fish in public waters, but they must follow the rules and regulations set by the government. These rules may include restrictions on the size and number of fish that can be caught.

Overall, a free fishery is a valuable right that allows a person to fish in public waters without any interference from others. It is important to follow the rules and regulations set by the government to ensure the sustainability of fish populations.