From 7/8/15
Shark Reef is located inside Mandalay Bay. This is not a super expensive attraction to go to as a matter of fact it's fairly cheap, and is actually worth your money.
Locals pay $15, it's $10 for a child's ticket. Visitors pay general admission which is $18, and $12 for a child's ticket. You can always opt for the 3 for 57 attractions that way you save a few dollars and get to see more at a lower price.
Before you enter they ask if you would like a pic in front of the green screen to capture your moment, we did not do this lol.
There are more than just sharks here, they have an array of fishes, turtles, snakes, and a few gators. The underwater walk-through is pretty darn majestic; you are surrounded by sea life as you walk through it. I would actually come back here again, I'm a fan.