pollution changing gender?

I was watching the news the other day and something caught my eye about pollution in the Mississippi river. Apparently male bass fish in the Mississippi are now getting female genes. They estimated about 75% of the samples they took have female genes. The male bass fish were now seen with female eggs in them. This is now another reason why we need to stop polluting our rivers. Even though this has been limited to the bass fish in the river so far it makes you wonder what other animals could be affected in the same way due to the pollution.