Manila Ocean Park is a huge area of various fishes, from the tiniest fish to the very large ones in their extremely huge tunneled aquariums, where you can either walk through the tunnels or ride the glass-bottom boat above.
I have tried both, and rding the glass bottom boat is way better, where you would realize that underneath the glass, at about six inches below you, a massive 14-foot sting ray swims, and other marine animals swim past you in a friendly yet a bit exciting manner. I also tried their foot spa, where tiny little dictor fish chew on unnoticed skin diseases or exfoliate the feet for a nice pinkish glow.
I also loved the tunnel, where I can see the manta ray's bellies when I look above me, and other fish like sharks and huge fish splash by.
There are also bamboo sharks and starfish that you can tough under the supervision of the staff, as well as deep sea creatures you can only see at the dark rooms. Their aquariums are very natural, with a 24/7 fresh water supply directly from the sea.
After a long walk in there, you may want to try the luscious and mouthwatering dishes at their fancy restaurant, or leave your kids on the quantum amusement center while you dine while overlooking the calm blue sea.