As well as a two-hour nature cruise, Black Cat offers a three-hour 'swimming with dolphins' experience. Wetsuits and snorkelling gear are provided, plus hot showers back on dry land. Observers can tag along (adult/child $85/45) but only 12 people can swim per trip, so book ahead.

Cruises have a 98% success rate in seeing dolphins, and an 83% success rate in actually swimming with them (there's a 25% refund if there's no swim).