Scuba diving Cocos Island Costa Rica can only be done from a liveaboard. To get there you need to fly to Cost Rica. Then it’s a 36 hour boat trip to Cocos Island from Puntarenas port. For experienced and advanced divers only due it its remote location of 342 miles off the cost of Cost Rica. The marine life there includes large numbers of hammerhead. But you will also see other shark species, including on occasion the whale shark, plus other marine creatures.