As one solution to the threat posed by Asian carp, workers are investigating using the fish to create organic fertilizer.
From the Chicago Tribune:
Workers along the Illinois River are hunting for invasive fish to turn into organic fertilizer, fillets and other commercial products.
The hope is to reduce the population of Asian carp threatening the Great Lakes. Originally imported to cleanse ponds in the South, Asian carp made it into Mississippi River waterways and have traveled north. The voracious fish can starve other species by consuming their food.
Read more here.