Eva,
My favorite no frills seafood in the area is Seafood World in Lighthouse Point. Exceptionally fresh, they have their own boats, casual, inexpensive for quality, preparation and service with an attached fish store to boot.
I go for the stone crab in in season, my father loves the jumbo fried shrimp and they always have a good selection of local fish simply prepared with a nod toward the Caribbean. Conch fritters, peas and rice and a rotating list of seafood centric soups, not to mention terrific cole slaw, round out the offerings. Not much of a wine list, but you can't have everything.
Seafood World Stone Crab
Enjoy,
Gary
Seafood World
4602 N. Federal Highway
Lighthouse Point, FL 33064
954-942-0740