La Grotte à Perez.

La grotte à Perez is a local Mediterranean dive site near Cassis, typically reached within a short coastal boat run. The site features a sheltered cave formed in rocky limestone with a gentle entrance and a shallow ceiling that gradually drops into clearer water. Divers commonly explore a short swim-in tunnel leading to a sheltered chamber and surrounding rocky outcrops. Conditions are generally calm with moderate currents deeper at the cave mouth and clearer visibility in good conditions. The site hosts typical Western Mediterranean species such as grouper, moray eels, wrasses, and octopus around the rocky ledges and around Posidonia meadows nearby. It is suitable for entry-level to intermediate divers with basic cave-navigation training and a careful buoyancy approach. Nearby Cassis and Marseille provide road access and boat support for local operators.