The folks at Island Divers Activities will take you snorkeling and scuba diving (as well as whale watching, jet skiing, and para sailing) daily. They have two daily snorkeling trips with the ride out leaving at 9 a.m. and returning at 1 p.m., for just $25. They'll take you to see loads of tropical fish as well as green sea turtles. They also offer discover Oahu scuba diving trips daily. No experience is needed to try scuba diving on this mission. The boat departs at 9 a.m. and returns at approximately 1 p.m. They have the choice between two different dive locations where you can expect to see hundreds of tropical fish and Hawaiian green sea turtles along several types of eel and other sea life. Use of scuba diving equipment is included and prices are $59 for a single tank dive and $89 for a double tank dive.