Invasive and Exotic Fish
Came across this just to throw more choices at ya, but still I don't think it is a comprehensive list by any means.
I agree with williamhj I think it would be an interesting perspective "for your paper to examine positives as well as negatives with invasives."
Also you asked "Is there anything else about these fish you feel would be good to put in this paper?"
It may seem silly to some, but I would be sure to identify "invasive" in your paper. In other words what is invasive?
I am still pondering on that question myself..better yet the positives and negatives of invasive species question.
Between those two question and the invasive species you have chosen you shouldn't have much problem getting your 6-10 pages.
Hopefully you are already started on your paper but for what it is worth my recommendation is to research and wright about fish species that you are most interested in. (Yes, I majored in the Obvious) Research different species that you fish for or ones that compromise a fishery that you enjoy and/or are passionate about. Get the straight up nitty gritty information from the local fishery biologist, DNR ect. That usually simplifies things for me, makes it fun and interactive. Better yet you are nearly guaranteed an "A" for putting in the extra effort for something that you are already interested in and want to learn more about.
Also, I would be interested in reading your paper once you are done. If you don't mind posting it or sending it my way I'm sure it would be a great read.
The never ending debacle of invasive species....
You have chosen a great topic!