They were released at the top of the Itchen just over 30 years ago and now we have a very good population, so much so that most of the coarse lakes have had to be fenced!
I think the theory was that there would only be enough territory for two pairs on the Itchen, but back then there were so many eels around I think they didn't need such large territory, now most of the eels have gone they have moved to the next easiest food supply.
They have spread into Hampshire from the west and are now as far as Kent.
We have them on our beats, they take a few stockie's which we can live with.