Bizeux
Rock islet at the mouth of the Rance between Dinard and Saint-Malo. The wall drops from about 10 m to 20 m and is rich in lobsters and conger eels, while the sheltered plateau (3–15 m) is used for try-dives and training and has a reconstructed archaeological trail with an anchor and cannons. It lies in an underwater biodiversity observatory zone.
depth: 3–20 m