Ate there last Sept with our elderly moms. Beautiful decor- one whole wall is the aquarium- and it has an underwater feel to it. All tables have a good view, too, but it was very noisy. As for the food, DH and I weren't very favorably impressed. Our waiter was not very attentive and acted like he had no time to bother with us. The food was hit or miss, and my husband thought the food at the nearby Sunshine Grill (and the local Red Lobster) was better. We won't go back. Too bad since it is a lovely place.
I suggest you take a look at the menu to decide. Of the 10 entrees, only 5 have seafood in them. If there's something you want to try, then give the Coral Reef a go. But, there are many other places to choose from at Epcot with fun themes, and seafood is easy to find in most towns.