--HOW TO GET THERE--
Tell the taxi driver that you are going to Shark Reef and don't say to take you to Mandalay Bay.
This place is at the VERY back of Mandalay Bay and you need to walk through the entire convention center in the back (about 5-10min walk?).
If you tell the taxi driver that you want to go to the reef, there is an entrance in the back next to it.
--Reef Review--
The reef is just a-ok. You get to see a Komodo Dragon, Alligator, some jelly fish, touch a stingray, go through a tunnel and then see the world famous aquarium.
It ends really fast, I'd say the most you can get is 30 mins.
The aquarium setup could've been better. There are so many bars and walls that it just felt cramped and you never have that "aww" moment of seeing a 1.3gallon tank. Yea sure, it's 360 to some level, but there are too many people to enjoy any of it. I went on a Tuesday too. I can't imagine how bad it would be during a weekend.
Cost is $18/person and there are some discounts if you are a Nevada resident or have collected enough points on the vegas app.