This method has been criticized for increasing toxicity of seabed, killing of fish eggs and other aquatic organisms.
For example, in August 2011, based on a citizen complaint, Lower Mississippi Riverkeeper discovered that a paper mill on the Pearl River in Louisiana had discharged untreated and partially treated black liquor into the river, causing a massive kill of fish and other aquatic life.
The U.S. part of the lagoon is not fed by any major streams and has few outlets into the Gulf; it therefore maintains a high salinity, which occasionally rises above a critical level and kills thousands of fish.
Hypoxia causes the Gulf's Dead Zone to swell to the size of New Jersey every summer and kills millions of fish and other aquatic life.
Hypoxia causes the Gulf's Dead Zone to swell to the size of New Jersey every summer and kills millions of fish and other aquatic life, seriously damaging the ecosystem as well as the fisheries economy.
These degraded conditions, especially the associated hypoxia/anoxia and high ammonia, have caused major kills of freshwater fish of all species in the affected areas, from minnows and gar to largemouth bass, and estuarine fish, including striped bass and flounder (Burkholder et al. 1997).
This is due to the fact that measuring meat quality traits requires killing of the fish and fish that have been challenge-tested for disease resistance cannot be used as breeding stock.
The spread of agriculture and industrialization dealt another blow, as pesticide runoff killed thousands of fish.
"They have been killing tons of fish just to find out where they are spawning".
The spill and cleanup killed millions of fish, an estimated 800,000 birds and 75,000 dolphins and whales.
