Catch and release is a practice within recreational fishing where after capture, often a fast measurement and weighing of the fish is performed, followed by posed photography as proof of the catch, and then the fish are unhooked and returned live to the water. Using barbless hooks, it is often possible to release the fish without removing it from the water (a slack line is frequently sufficient).
Catch and release is a conservation practice developed to prevent overharvest of fish stocks in the face of growing human populations, mounting ecological pressure, increasingly effective fishing tackle and techniques, inadequate fishing regulations and enforcement, and habitat degradation. Sports fishers have been practicing catch and release for decades, including with some highly pressured fish species.