Devices for the voluntary self-sorting of live aquatic animals

A device for voluntary self-sorting of live aquatic animals, comprising:

• at least one passage device, by which a water tank is divided into a passage-facilitating region and a passage-obstructing region, the at least one passage device comprising a carrier plate,
• wherein the at least one passage device has a plurality of gap-shaped passage openings in the carrier plate that are adaptable in size to the aquatic animals to be sorted,
• wherein the at least one passage device comprises guides adjacent to one another that protrude from the carrier plate towards the passage-facilitating region and retainers that protrude from the carrier plate towards the passage-obstructing region,
• wherein outer angles of the guides point towards the passage-facilitating region,
• wherein the retainers are formed by inner angles of the guides,
• wherein the guides comprise angular sections with an invariable inner angle and an invariable outer angle, and
• wherein a width of the gap-shaped passage openings is adjustable by a spacing of adjacent angular sections.