You don't tend to hear about it and not that there isn't still progress to be made, but there has been tonnes of progress on fisheries interactions with protected bycatch species. For ex the infamous dolphin problem in the eastern tropical Pacific purse seine tuna fishery is down 99.8% from its peak to the point populations are recovering, despite the fishery intentionally setting on dolphin schools to catch > 150,000 t of yellowfin tuna per year.
Pelagic gillnets are probably the gear that still have the most issues with dolphin bycatch, and acoustic pingers that play a loud ultrasonic tone when they detect an echolocation click are already used to reduce interactions in some fisheries.
Pelagic gillnets are probably the gear that still have the most issues with dolphin bycatch, and acoustic pingers that play a loud ultrasonic tone when they detect an echolocation click are already used to reduce interactions in some fisheries.