1. 
   hydrobiology
   (from the article `limnology`) ...those found in lakes and ponds. The discipline also includes the biological, physical, and chemical aspects of the occurrence of lake and pond ...
   Found op http://www.britannica.com/eb/a-z/h/88
   
   
2. 
   hydrobiology
   hydrobiology 1. The study of life, or living organisms, in aquatic habitats. 2. The study of live forms in bodies of water; such as, lakes or estuaries.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1009/4
   
   
3. 
   Hydrobiology
   Hydrobiology is the science of life and life processes in water. Much of modern hydrobiology can be viewed as a sub-discipline of ecology but the sphere of hydrobiology includes taxonomy, economic biology, industrial biology, morphology, physiology etc. The one distinguishing aspect is that all rel...
   Found op http://en.wikipedia.org/wiki/Hydrobiology
   
   

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