It's amazing to know that there are seafood buffet in Singapore. I personally love the one I recently re-visited (been there for I think 2 times).It's the Chong Pang restaurant. First, i recommend this because it is very cheap! 18 SGD for the seafood/hot pot buffet! They are now located in Turf City ( previously they were at Marina Bay). To go there, just alight at the Toa Pa Yoh MRT station and ride the free shuttle going to Turf City.
Chong Pang not only has raw seafood but they have breads, noodles etc. Oh, one more thing, drinks is free flow! What a deal! I sure will come back!