I've been here 4-5 times. I love this place! The admission is pretty steep but they have a wide variety of animals to back that up. It was really exciting seeing a Komodo dragon, the first time I've ever seen one before (on my last visit here in June 2017). They have pacu, piranha, sharks, stingrays, jellyfish, crocodiles, lionfish, a touch tank? Etc. It's quite a walk from the main entrance of mandalas bay, but exercise is good :)
There's a small gift shop located inside and another outside of the venue. I got the admission as part of my 3 punch las Vegas attraction deal last time. Every other time I have paid full price. Good time for families and adults alike!