If Marine life is what you like, I once again have to recommend Sting Ray City Sandbar. We did this with Carnival on a yellow brand new modern catamaran. I think the tour company had a turtle on their logo. It was top notch. The sting rays are great. If they want to be around you, they will, if they don't, they won't. My mom pretty much worries about EVERYTHING and even she was ok with it? So as long as you don't have people terrified of sea life, it should be pretty top notch. We loved it. It was natural sea creatures being sea creatures, no tanks, no tails clipped, basically paradise. Our wristbands let us in to Royal Palm beach to enjoy the rest of our day, which was perfect on 7 Mile beach and only $4 shuttle back.