It is a single location dive. A dive the late afternoon during the light and then we come up as planned just before the sunset. We watch the sunset, a Keys favorite, and then prepare for the second dive. Once dark, we dive the second dive to witness an amazing transformation of the reef. New species coming out of the coral, new activity all around, and even surface bioluminescence that you will be delighted to see. It’s a new world down there and you will be one of the few lucky ones to see it all happen in front of you.
A third type of volcanic oceanic island is formed over volcanic hotspots. A hotspot is more or less stationary relative to the moving tectonic plate above it, so a chain of islands results as the plate drifts. Over long periods of time, this type of island is eventually "drowned" by isostatic adjustment and eroded, becoming a seamount. Plate movement across a hot-spot produces a line of islands oriented in the direction of the plate movement. An example is the Hawaiian Islands, from Hawaii to Kure, which continue beneath the sea surface in a more northerly direction as the Emperor Seamounts. Another chain with similar orientation is the Tuamotu Archipelago; its older, northerly trend is the Line Islands. The southernmost chain is the Austral Islands, with its northerly trending part the atolls in the nation of Tuvalu. Tristan da Cunha is an example of a hotspot volcano in the Atlantic Ocean. Another hotspot in the Atlantic is the island of Surtsey, which was formed in 1963.