The only site that I know as the Aquarium was out at the Atolls. Absolutley amazing site. I think it was probably the same site that an earlier poster mentioned. However, it began at 15'. I know this because when we were ascending to return to the boat, everyone else got back on board and while they were doing that, I took a nice long leisurely and fabulously enjoyable safety stop. Amazing. I saw large trumpet fish pair, scrawled cowfish and a plethora of other fish. Sometimes it seemed that the schools were so thick, you couldn't see other divers.