Hi Fiona, so many great restaurants and cant bring names to mind, but for seafood, directions are, assuming thet are staying in Ao Nang :-
Standing on the seafront, facing the sea, turn right, at the far end of the beach is the booking office for longtails. Carry on just past the office, ignoring the road that bears to the right, and keep left into what seems like a covered walkway. They will find 4/5 open plan restaurants, all kinda joining on to each other, serving every kind of cuisine, but concentrating on seafood. The Barracuda is mouth watering, but thats about the limit of my palate, wish i was more adventurous with seafood dishes as there are some wierd and wonderful items on the menus.
Hope it helps
Eddie

thanks Eddie
I'm sure it will help