This is one of the reasons I went to Singapore. Everything is so good and calm. If you buy the ticket from the app, you don't have to queue; just show the QR to the officer at the front gate. I suggest you not drink tap water inside the aquarium because it tastes weird. Sorry, I am just not used to it; I am from Indo, so water is cheap compared to Singapore. It can be said it's worth the price, but it's not like you are gonna come back again to see it again. Just once and try other places in Sentosa.