A device to provide a bypass for fish from an upstream reservoir behind a dam, to a lower elevation downstream reservoir. The device employs a flow separation apparatus for separating aquatic life entering the device and communicated to the downstream reservoir, from a portion of fluid flow communicated to the dam intake. The moving fluid within the device creates turbulence to provide a cushioning effect to protect the fish from impacts, while directing water streams to urge fish to an upper portion of the device distant from the water being communicated to the dam in the lower portion.
