Bycatch
Fish and other animals caught by accident while fishing for something else, often thrown back dead.
Also: discards, non-target catch
Most fishing gear catches more than the target. Shrimp trawls can bring up several kilos of other animals for every kilo of shrimp. Longlines for tuna hook sharks, turtles and seabirds. Gillnets tangle dolphins. Unwanted catch is often thrown back, usually dead, and is called discards. In Indian trawl fisheries much of the bycatch of small and young fish is landed as low-value trash fish for fish meal and poultry feed. Fixes include turtle excluder devices, square-mesh panels, circle hooks and closed areas.