The Thai government is doing a good job in protecting the natural environment. This island and the neighbouring islands form the Ko Rang Marine National Park. The coral reefs of Ko Yak Lek are very beautiful. However, the disadvantage of this water is that it has a depth of more than 3 meters and is therefore not the best place to dive. Ko Tao and Ko Lipe would be better. There are also many tourists coming here to swim (most of them snorkel in life jackets), large fish mostly hidden in coral reefs, only a few smaller fish can be found, but few species. In fact, if you come in May, you can also go to Ko Mak and Ko Kuud. However, Ko Rang will also close from June to October. Early May to mid May is the best time since the off-season is just beginning.