Originally Posted by indjo
Not necessarily. What ever creatures that thrives there managed to develop immune systems that can overcome what ever parasites (natural selection). Fish caught from nature will survive if they can get through their stress but domestically bred fish may get sick if they're kept in the same tank. This indicates that the wild specimen has better immune systems compared to domesticated fish, not because it's from a healthy environment, though .
Sorry, wasn't clear on that. I meant healthy as in free of human pollutants like pesticides, which is what I'd worry about. The animals I listed are the first to go when there are pesticides or other toxic human pollution in the environment. :D
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