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video podcasts quizzes advertisement howstuffworks animals wild animals fish sharks cheap magnets could keep sharks out of fishing nets by jesslyn shields aug , " " trawling nets like this one sink to the sea floor, picking up whatever's down there. countless sharks, sea turtles, seals, dolphins, rays
gear you need to catch shrimp, including a trawling net the size of a sports field, which sinks to the seafloor and bumps along on the bottom, picking up whatever's down there. when it's hauled back in, some of what's in the net is shrimp — but it also contains sharks, sea turtles, seals, dolphins, rays...
https://animals.howstuffworks.com/fish/sharks/cheap-magnets-could-help-keep-sharks-nets.htm