If seeing all that fish makes you suddenly crave for seafood, then Oceano is the place for you. Located by the Fish Spa and Stingray Feeding corner of the Manila Ocean Park, Oceano is like a smaller version of Circles with a shorter buffet. Run by Steve Tamayo (of Tamayo's catering), Oceano is a fusion of Meditarranean, Western, and Asian cuisine which you can enjoy for just P600.
The restaurant is very clean, well lit, and has good exhaust. The staff are friendly and quick. And no, the seafood doesn't come from the aquariums in the lower level.
