Yes, it is.

I read somewhere that lobsters grow well in polluted waters.

before it is processed yes.but after they clean it no.

The waters are polluted in rivers,lakes,ponds and sea's. The reason is because people are throwing things there not ment to in the rivers etc. Or that the factories produce gas in the air and that goes to the river :)

There are hundreds of species of fish and even microscopic life forms that live in polluted waters. Some of these actually mutate into different types of the same species.