Difficult entry into the water from Zodiac;took a couple of minutes to get used to the water temp and currents! My buddy Juan took a while to equalise so I waited until he was fine before we both descended via the anchor line to around 10m. Once the group was together – including myself and Juan there were six others inlcuding two dive masters – we descended to 15 metres along beautiful underwater rock formations passing through a tunnel approx.10ms long. Once out the other end we gradually surfaced to the anchor line for the de-co stop at 5m. It was an atmospheric and unusual dive as I had only dived in relatively warm/coral seas prior to this!