It is interesting to see that eel-fishing has now been banned in the UK. It is not before time, because not only has the population plummeted, but nobody has any realistic explanation for it. Eels have been of economic importance to humankind for thousands of years, and it is embarrasing quite how little we know about them.
Our experiments in eel-keeping were pretty unsuccesful with the last of six eels dying a few weeks ago. But even our attempts at anguilla husbandry opened enough cans of worms to make it perfectly obvious that more research is needed NOW!