According to fishing regulations, what must happen to all trout caught?

The requirement that all trout caught must be released alive is a conservation measure designed to protect trout populations and ensure their sustainability. This regulation helps maintain ecological balance in aquatic environments and supports the continuation of fishing opportunities for future generations.

Releasing trout back into the water allows for their growth and reproduction, contributing to the overall health of aquatic ecosystems. Protecting these fish is particularly important in regions where trout populations may be vulnerable to overfishing or habitat degradation. Therefore, adhering to this regulation is crucial for the preservation of local fisheries and the enjoyment of fishing as a recreational activity.

Other options present scenarios that would not align with conservation efforts or current regulations. Keeping trout under a certain size may lead to the removal of younger fish that are necessary for population replenishment, while cleaning and releasing trout doesn't effectively support their survival. Allowing trout to be kept regardless of size could result in significant depletion of trout stocks, undermining the management strategies in place to protect this species.