Lake classification used to describe young bodies of water characterized by deep, clear, cold, weedless water that can support fish, such as trout.
<ecology> Describes a body of water in which nutrients are in low supply. ... (09 Oct 1997) ... 
Describing a body of water in which nutrients are in low supply.
oligotrophic 1. A reference to a body of water deficient in nutrients for supporting plant life, but rich in oxygen for supporting animal life. 2. Having low primary productivity; a reference to substrates of bodies of water low in nutrients. 3. Referring to any organism requiring only a small nutrient supply, or restricted to a narrow range of n...
Refers to water bodies or habitats with low concentrations of nutrients 
Low in nutrients, with low productivity.