Underwater sensors caught a rare event off Cornwall: one porpoise became trapped in a net while two animals exchanged possible distress calls

• Bycatch, the accidental capture of animals in fishing gear is considered the world’s greatest direct human-caused threat to dolphins and porpoises.
• Off the coast of Cornwall, a set of underwater sensors was listening to the ocean when it detected something researchers rarely get to see.
• According to an online report by Phys Org, two harbor porpoises swam around a fishing net, seemingly foraging for food and avoiding the gear, until one got caught up in it.