A Seattle company called Whooshh Innovations has developed a creative way for fish to swim over hydroelectric dams. This product creates a pressure difference around the salmon, sucking the fish up a long tube and releasing it at the top of the dam.

“We do introduce a little bit of water to keep them moist and keep their gills moist and all those kinds of things for the few seconds it takes them to get through the system,” said Mike Dearan, Whooshh’s chief engineer.