Andrea I is a reef and wall site in the Caribbean Sea, part of the Netherlands. It is accessed from shore. Depth at the site starts at 3 to 6 metres, depending on the source. It is described as ranking among the most accessible dive locations on the island. Green turtles and schooling fish are resident. Hawksbill turtles, moray eels, rays, reef sharks, cephalopods and crustaceans are occasionally seen. Seahorses and pipefish are rare. Best months for diving run from April to November.