Green Island Tours and day trips – with the best in the business. Big Cat Green Island Reef Cruises offer multiple options including two full day and two half day departures daily, we also offer Cairns tour packages incorporating full and half day Great Barrier Reef tours combined with must do Cairns attractions, ensuring you have an unforgettable Cairns holiday in Far North Queensland. Snorkel, glass bottom boat tours, swim, dive, helmet dive or simply relax on a Great Barrier Reef cruise for a day on a tropical island paradise. Big Cat operate the only Semi Submarine advanced coral viewing tour available at the Island. A family owned and operated business, the Wallace family will ensure you’ll be travelling with one of the most experienced reef operators who are renowned for the some of the best customer service and product in Cairns. Your Green Island adventure starts here.