Relating to or characteristic of the epilimnia, the warm surface layer of a stratified lake.
From epilimnia + -al suffix, formed in early 20th-century limnological terminology to describe properties of the surface lake layer.
When scientists call something 'epilimnial,' they're describing the cheerful, well-lit zone where fish like to hang out because it's warm and full of oxygen and algae—until summer peaks and it gets too hot!
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