The invention relates to a fish ladder with a plurality of interconnected individual basins (71) forming a flow path, each having an outer wall arrangement (72) forming a water receiving space (77, 78) and a transfer slot opening (76) for the flow of water between adjacent individual basins ( 71) The individual basins (71) each contain an inner wall arrangement (73), which subdivide the water receiving space (77, 78) of the individual basins (71) respectively into a first and second water receiving space (77, 78). The water receiving spaces (77, 78) are interconnected via a flow-through slot opening (75) in the inner wall assembly (73) for the flow of water from the first water receiving space (77) into the second water receiving space (78).
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