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The salmon cannon is one way of helping fish get over a dam

from Smithsonian

Dams are one of the biggest problems for fish that undertake migrations, like salmon. If a big wall blocks the route to breeding or feeding grounds, that can spell doom for the fish. And the existing mitigation measures, such as fish ladders, aren't very effective solutions. Enter the salmon cannon. As ridiculous as it sounds, one group of entrepreneurs from a company called Whooshh Innovations thinks that shooting fish down a tube and then firing them into the air could be a solution for helping fish like salmon overcome migration barriers. more


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