When cod fishers haul in their nets they often find many other fish they can’t use. To reduce this unwanted bycatch researchers have developed a net with a kind of escape hatch that allows flatfish to swim away underwater.
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For their designs, they examine the behavior of different kinds of fish in the nets. In the case of bottom-feeders like flatfish, they were able to build a kind of escape hatch into the net - and initial results are encouraging.
