I heard that there are fewer people at the Blue Cave in the morning, so I chose the 5:40 AM slot. Indeed, the early bird catches the worm; choosing such an early slot was truly worthwhile. At this time, there was no one around, and the lighting was beautiful. My friend and I had the whole place to ourselves! Brother Ah Shan was very professional and knowledgeable about the Blue Cave's conditions. During the tour, he was humorous, witty, and thoughtful, constantly reminding us of precautions to prevent injuries (e.g., be careful not to hit the reefs). The tour was very detailed, and he showed us many creatures. The entire exploration experience was superb! His camera skills were also super professional, and he took so many great photos for us. ---- I also highly recommend everyone to join the intertidal zone tour. Brother Ah Shan took me on a thorough walk through the entire intertidal zone, searching for small marine creatures and plants along the way. These were truly things I wouldn't have seen if I had just wandered around by myself. It felt like a treasure hunt, super fun! We were very lucky to see a sea snake in the intertidal zone, which should have been living in the Blue Cave. The entire activity was incredibly good value for money, highly recommended! 👍🏻