Ocean Adventure is an open-water marine park. From the center of Subic, it will take you about 20minutes. Upon entering main Subic freeport area, turn left from Petron. There are lots of signage that will help you find the place. You will pass through Subic airport and it's the same direction going to Zoobic Safari and about 5minutes from there.
The main attractions of the park are the Dolphin Friends Show, Sea Lion Marine Patrol Show and the show at the Eco Theather. There are two aquariums also but not that big. You can also find there the most dangerous predator!
I enjoyed the dolphin show although I did not have the great view since I was standing just beside the main stage and that there a many people opening their umbrellas! Fortunately, I was able to catch some parts of the show while having our dinner at the Ilanin Bay Cafe. You can actually have a limited view from there.
Overall, I think the park is worth visiting especially with your kids. As always, the shows are educational and teaches us to love animals and protect our environment. One of my friends even informed me that the show in the Sea Lion is better than what they had when the visited a Sea Lion show in Hong Kong!
More info of the park can be found here : http://www.oceanadventure.com.ph/index.html