I knew rainbow trout could be found in some waterways around the Island, but I didn't realize that they are spreading. I am not sure if this is a bad thing, but if rainbow trout do out-compete Atlantic salmon, that would not be good.

Rainbow trout are not from here, but they sure like it on P.E.I. which might be a problem for Island fish, says a student looking for answers.

Scott Roloson is a masters candidate at the University of Prince Edward Island. His study into rainbow trout is co-funded by the Atlantic Salmon Federation.

“Prince Edward Island in recent decades has had rainbow trout, which is non-native to P.E.I., establish in over 20 rivers,” said Roloson.

“My study is an investigation into why the rainbow trout has succeeded on Prince Edward Island and not done so anywhere else in the Atlantic provinces.”

Rainbow trout, native to the West Coast, grow much bigger than brook trout and most of them live a dual lifestyle. For part of their life they may take to the ocean during which time they are known as steelhead salmon. When they live in fresh water, they take on the name of rainbow trout.

Rainbow trout pushing way into P.E.I. streams
http://www.theguardian.pe.ca/News/Local/2011-04-17/article-2433602/Rainb...