Served me rotten food!

Served me rotten food!
The GOOD_ Seems like the restaurant is under new management or has a new chef. Some of the dishes have a 'facelift' and there were a few new items. Service was pretty good.
The NOT GOOD_I ordered the stuffed flounder. When I tasted it the fish tasted like sour milk. It was nowhere near fresh. When I asked my husband to taste it to make sure, he said he could smell it from across the table.
Of course I sent it back and of course they took it off the bill but no one offered any apology. The manager never came over or anything. I guess it was no big deal.