The product known as gurry is then turned into a liquid, stabilized and eventually becomes organic fertilizer. "When you fillet a fish, only 30 to 40% is the fillet. So, 60 to 70% is left over.
Nearly 750,000 fish were killed when a fertilizer spill in Red Oak, Iowa, impacted the Nishnabotna River. New Cooperative notified the Iowa Department of Natural Resources of the spill on March 11.