Twice a month they let scuba divers in at night at Hanauma Bay. Now snorkeling would be cool and looks really cool from up above to see all the lights moving around the bay. Diving is a different story. You can catch the trolley down the hill ($1 per tank, 75 cents per person, and 25 cents per big bag). Unfortunately, the trolley stops at 8 pm so you need to lug every thing back up the cliff road your self...not for the faint-hearted. :-D

I think you can see all the critters on the reef just as well with a snorkel at night, that’s my plan for next time. If you haven’t been there in the past year, you need to watch a 9 minute movie before they let you down the hill (day or night).