We got to see sting rays, a sea turtle, dolphins, and fish snorkeling. (Even saw Dori off of Finding Nemo š) Get up by the rocks to see the prettiest fish.
Sitting in the front is the best. There are net type things you can sit on in the very front you get wet, but you are close to the water.
The ladder was hard to get up because of rough waves. Older people really struggled.