selling rockfish as snappers. Iv'e never heard of that.
That's a trick restaurants pull on tourists on the west coast; I'm not sure about the east coast. In the west they call it "pacific snapper." Yet rockfish can taste fantastic if you prepare it well.
Look here for market names of rockfish.
http://www.montereybayaquarium.org/cr/SeafoodWatch/web/sfw_factsheet.aspx?gid=16Marketing one fish as another is not uncommon in the seafood business, as most people don't know or can't tell the difference. Some public interest researchers have done genetic tests on seafood offered at various restaurants, and the % of restaurants that dupe their customers is disturbing.