Countershading

Countershading, or Thayer`s Law, is a form of camouflage. Countershading, in which an animal’s pigmentation is darker dorsally, is often thought to have an adaptive effect of reducing conspicuous shadows cast on the ventral region of an animal’s body. In essence the distribution of light on objects that are lit from above will cause unequal r.
Found on http://en.wikipedia.org/wiki/Countershading

Countershading

body colouration which is dark above and lighter below
Found on http://australianmuseum.net.au/Glossary-of-fish-terms

Countershading

Condition of organisms in the water column that are dark-colored on top but light-colored on the bottom
Found on http://life.bio.sunysb.edu/marinebio/glossary.c.html

countershading

(from the article `concealing coloration`) ...identity and location of an animal may be concealed through a coloration pattern that causes visual disruption because the pattern does not ... Another clue can lead to the recognition of an organism: its three-dimensional form, which causes the unilluminated portion of the body to be in ......
Found on http://www.britannica.com/eb/a-z/c/150

Countershading

Light underparts and dark upperparts of plumage disguise the outline of a bird, aiding in concealment.
Found on http://www.sialis.org/glossary.htm

Countershading

A color pattern, serving as camouflage, in which dark colors occur on the upper portion of the body and lighter colors occur on the underside.
Found on http://www.conservewildlifenj.org/glossary/

Countershading

Condition of organisms in the water column that are dark-colored on top but light-colored on the bot
Found on http://www.superglossary.com/Glossary/Science/Marine_Biology/
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