Abstract: Keepnets allowing safer and easier release of fish retained therein with reduced danger of damage to the fish comprise a tubular net (1) open at one end (2) and closed at the other (3), the net having a rigid mouth-ring (5), a terminal ring at the closed end and a plurality of intermediate support rings (4) spaced along its length between the mouth-ring and the terminal ring. One of the intermediate rings (10) is of substantially rigid construction as opposed to the relative flexibility of the remaining intermediate rings (4). The rigid ring (10) is used as a secondary mouth when releasing the fish to reduce the length of net over which they have to be tumbled and thus the risk of damage to them. Various designs of net using this principle are described.