Fish Tacos in williamsburg/greenpoint/bushwick area?
haven't had a great one in the nabe yet, but...
bonita (bedford @ s. 3rd) has tasty simple ones.
carmaya (n 6th btwn bedford and driggs) has something they call a fish taco but it's more of a fish burrito. tasty but pricey.
endless summer truck (usually parked on bedford and n.4th is on weekends) has cheaper variety that are only so so.
san loco (n. 4th btwm bedford and driggs) has em... but, well, it's san loco... barely recognizable as fish.