And there's plenty of time for swimming and snorkelling (gear provided) among the fantastically colourful fish and giant clams. You might even (as I did) see rare turtles skipping through the water.
At NZ$493 *(UK£260, US$340, 300 Euros, AUS$475), it's not exactly cheap, but the price includes return flights and a barbecue of just caught fish during the cruise. So, if you only do one excursion during your visit to the Cook Islands, this has to be it (and I promise you no one has paid me to say that!). You can book through the tourist office in Rarotonga, at your acommodation or direct with the airline