I didn''t realize eels were in short supply. When I get sushi, unagi nigiri is one of my favorites, but first comes anything with masago/tobiko style fish eggs (both are tiny eggs). I'd happily trade lab-grown eel for wild. I'd be even happier to eat lab-grown eggs, but I suspect there's more of a trick to that.
@memfree As far as I understand it, ocean eels are less of a problem, but freshwater eels are in increasingly short supply. Either way, I like this as an alternative.