Lonely Planet review
The four-hour Dolphin Cruise (adult/child $95/48) departs daily at 9am and 1.30pm, actively seeking out dolphins and any other marine mammals en route to the Hole in the Rock, stopping at Urupukapuka Island on the way back.
You won't visit the Hole in the Rock on the four-hour Dolphin Eco Experience (adult/child $105/53, departs 8am and 12.30pm), rather the focus is finding pods of dolphins you can swim with.
The full-day Cream Trip (adult/child $109/55) follows the old supply and mail route around the whole of the bay and includes dolphin-swimming and boom-netting (where you can get close to the critters while being dragged through the water in a net).
A glamorous option for an overnight cruise is the launch Ipipiri . On this floating hotel the accommodation is by way of en-suite state rooms. All meals are included, and if you get sick of lazing around the bar on the sundeck, you can partake in kayaking, snorkelling or island walks.