Interesting post on gobies. We have been fishing the Thousand Islands area for quite a few years now and at first would be catching quite a lot of them. We have been gradually catching less and we just got back from a weeks vacation there and didn't catch any. The bass, pike and perch have now been feeding heavily on them. They must still be around but I have only seen them in fish that we decide to keep and find them in the stomachs.
That's great news. The gobies are very aggresive when it comes to protecting their nests. They have spread quickly and abundantly over the areas that I normally fish. When I contacted the MNR last year about them they told me that they were not sure how the predators would co-exist with them.
Cook your fish well, they do carry other harmful organisms, namly botulism. Here is pdf on the invasion.
http://www.d.umn.edu... Round Goby.pdf
Another good site Round Goby facts:
http://www.seagrant....i-roundgoby.htm
Be sure to cook your fish well to reduce your chances of any diseases.