In an effort to conserve sensitive species of fish, some sport fishing is entirely catch-and-release, meaning that the fish are returned to the water once brought ashore. However, too much fishing may affect the behavior of the target species and the sustainability of the fishery. Now, for the first time, a team has tested whether this is indeed the case. The team shows that a coveted sport-fishing species, the giant trevally, can be sensitive to too much fishing pressure. This result comes from a 'natural experiment' presented by the COVID-era closure of the fishery and has widespread management implications for the species throughout its range in the Indian and Pacific oceans.
