When an object rests on a surface, such as a table, for example, the downward force it applies to the surface is counteracted by an equal but upwards force, or reaction, applied by the surface. See more at Newton's laws of motion. A response to a stimulus, such as a reflex.
State. Aquatic Invasive Species: Snakehead (PDF | 201 KB). Indiana Department of Natural Resources. Northern Snakehead. Maryland Department of Natural Resources. Northern Snakehead Fish (Channa argus). New York Department of Environmental Conservation.
Channa argus. The northern snakehead is a predatory fish native to southern and eastern Asia that is now found in several American states. The fish was likely introduced to the United States by people who bought live snakehead from fish markets or pet shops and later released them into lakes, rivers or ponds.hanna argus. The northern snakehead is a predatory fish native to southern and eastern Asia that is now found in several American states. The fish was likely introduced to the United States by people who bought live snakehead from fish markets or pet shops and later released them into lakes, rivers or ponds.