Is this the one Nancy?
RCL site says cost is $139; transfer is by Taxi, and you get a locker. Here's a description of the activities with the dolphins:

Following the briefing, swimmers will enter the water standing on a submerged platform for an introduction to their new Dolphin friend. Lots of contact will happen at this portion of the program as you get to touch the Dolphin and pose for a big dolphin kiss. Professional photographers and videographers will be there to catch all the action.


Next your trainer will lead you into deeper water, wearing a lifejacket, where you will perform various close contact behaviors with the Dolphin such as holding on to their pectoral fins as they pull you around or dancing belly to belly with your new friend. Fly across the water as you ride a Boogie Board while your Dolphin pushes you, exclusve to the Dolphin Push, Pull and Swim! During the final part of your experience, you will be asked to don your mask and snorkel to accompany your Dolphin and Trainer into the natural reef area. There you will marvel at the grace and intelligence of these amazing animals as you watch them swim next to you underwater and perform breathtaking behaviors with their trainer. This is the most amazing section of the program as guests will have the opportunity to see the dolphins in a three-dimensional world as they do fast swims, high jumps and other exciting behaviors.

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