La Petite Sirene is a bright reef-and-drop-off dive south of Pointe Burgos in Les Anses-d'Arlet, best treated as a boat dive with local guidance. A shallow coral plateau opens onto reef edges, cracks, a small tunnel, and a more active outer line, so the site rewards divers who like varied terrain and changing light more than a simple flat reef. It works best on calm days and early starts, when the shallow section reads clearly and the outer side feels easier to manage.