Discover the awe inspiring underwater world of the ocean at sea aquarium the worlds largest aquarium with a day pass gain entry to multiple marine habitats viewed through the worlds largest window to the sea get up close to more than 800 species including more than 200 sharks sneak a peek at a moray eel in a rocky crevice or tour an underwater reef community fun for the whole family if you choose you can upgrade to include a one way transfer from your singapore hotel and se