Fish kill
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The term fish kill, also known as fish die-off, refers to a localized mass die-off of fish populations in a body of water, which may also be associated with more generalized mortality of aquatic life.
There are many causes of fish kill, but oxygen depletion is the most common cause. A winterkill is shown.
Dead and dying European carp in Lake Albert. Fish kills are often a sign of environmental stress.
This pond in New Forest, England, has been restored following a viral infection which killed all the fish.
A small algae bloom on River Cam near Trinity College
Harmful algal bloom
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A harmful algal bloom, or excessive algae growth, sometimes called a red tide in marine environments, is an algal bloom that causes negative impacts to other organisms by production of natural algae-p
Fish kill
…with more generalized mortality of aquatic life. The most common cause is anoxia in the water, which in turn may be due to factors such as drought, harmful algal bloom, overpopulation, or a sustained increase in water temperature. Infectious diseases and parasites can also lead to fish kill. Toxicity is a real but far…
Cyanobacteria algae on the coast of northern Germany
A harmful algal bloom event off the coast of San Diego, California
Harmful algal bloom in a harbor in Japan
A harmful coastal algal bloom event