Shark repellent

For the business strategy, see Poison pill.

A shark repellent is any method of driving sharks away from an area. Shark repellents are a category of animal repellents. Shark repellents are of interest to the commercial fishing industry as well as to swimmers, surfers, and other people in the ocean. Shark repellent technologies include magnetic shark repellent, electropositive shark repellents, electric repellents, and semiochemicals. Some electric repellents may reduce shark interactions with bait by about half, depending on the product, the type of shark, and other factors; the other types are not expected to have a significant protective effect for swimmers.

Shark repellents can be used to protect people from sharks by driving the sharks away from areas where they are likely to harm human beings. In other applications, they can be used to keep sharks away from areas they may be a danger to themselves due to human activity. In this case, the shark repellent serves as a shark conservation method. There are some naturally occurring shark repellents; modern artificial shark repellents date to at least the 1940s, with the United States Navy using them in the Pacific Ocean theater of World War II. However results from modern studies have been mixed with electric shark repellents being independently assessed as the most effective shark deterrent for swimmers.

In addition to shark repellents, there is bite-resistant fabric.

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