Semi-Submersible Tours daily from Avatiu Harbour on the North side of Rarotonga just 5 mins from Town/Market. Sea and weather conditions dependent. This is the only semi-submersible on Rarotonga – not a glass bottom lagoon cruise – you will see big fish and a shipwreck that is nearly 100 years old, turtles and giant eels spotted regularly, look for sharks, rays and pelagics too!