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Old 07-09-2009, 11:12 PM
Markxxx Markxxx is offline
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Join Date: Apr 1999
Location: Chicago,IL
Posts: 14,962
I know there are kinds of Sharks that can live in freshwater and kinds that can't. So I was wondering if it was a species adapting over time, or could any sea mammal be put in water of any type? As long as there was food and the water was the right temp.

I mean like could a seal or walrus swim up a river and live there just fine?