A bowfishing nock adapter providing a robust stop supporting element configured to support a bowfishing line stop and to support a nock is disclosed. The bowfishing nock adapter may be formed from an elongated adapter body configured to be attached to a distal end of an arrow at a proximal end of the elongated adapter body. The elongated adapter body may include an arrow retention system that, once crimped, prevents the bowfishing nock adapter from being removed from an arrow. The bowfishing nock adapter includes a stop supporting element configured to support a bowfishing line stop such that the bowfishing line stop is removable.