Magnet fishing is using a magnet to remove objects from waterways. It is illegal in many jurisdictions because it can cause environmental damage and harm to wildlife. Magnets are attracted to iron and other metals, so they can easily remove them from the bottom of a river or lake.
It can also harm swimmers and boaters if the magnets are improperly secured. This can disturb the natural habitat and disturb delicate ecosystems. In addition, animals can be harmed if they become entangled in the magnet’s line.