Sorting device for live fish

A sorting device for live fish, comprising:

• an upwardly open water tank;
• and
• a vertical grid unit connected to an inside of the water tank via a circumferential sealing element, dividing the water tank into two separate regions, the vertical grid unit having a plurality of slit openings which are delimited by horizontal and vertical webs and which are adaptable in shape and size to the fish to be sorted and are closeable,
• wherein the grid unit comprises at least one carrier plate and at least one adjustment plate having an identical design and arrangement of the slit openings and of the horizontal and vertical webs,
• wherein the at least one carrier plate divides the water tank into the two regions and the adjustment plate is displaceably arranged on the at least one carrier plate, and depending on a position of the adjustment plate, the slit openings of the at least one carrier plate are covered by the horizontal and vertical webs of the adjustment plate so as to form effective slit openings between a maximum value and a minimum value, and
• wherein the effective slit openings on the at least one carrier plate are completely opened at the maximum value and are closed at the minimum value to such an extent that the fish to be sorted are prevented from swimming through.