I LOVE LOVE LOVE unagi. (roasted/broiled eel) It is so good in sushi or in unagidon (rice bowl) and udon.
Anyway, the Seafood Watch
group discourages the consumption of eel due to significant decreases in population.
I am wondering what, if anything, can be used as a decent replacement? Mackerel has been "ok" (due to the natural fattiness/oilyness and texture), but it isn't the same.