Perhentian is a great island for scuba diving and snorkeling. Especially great are the affordable prices of accommodation, you can stay at the island for a mere $15, - a night. Because of these great prices, Perhentian is a very popular island among tourists. Add the crisp marine water to that, and you will be having the time of your life at this island. If I would rate all Malaysian islands, Perhentian would probably score a 9/10.