On the east coast of Mauritus and southeast of Trou d'Eau Douce, the snorkeling at Ile Aux Cerfs Lagoon offers plentiful reef fish. The Ile Aux Cerfs Lagoon is located 1 mile southeast of Trou d Eau Douce on the east coast. This boat accessed snorkeling spot in the middle of the lagoon near the barrier reef tends to have older decaying coral but good marine life. While snorkeling in the lagoon, you may encounter parrotfish, butterflyfish, surgeonfish, damselfish, and giant clams.
The best time of year for snorkeling off Mauritus is during the summer from December through March. The water water is ideal habitat for plentiful marine life and the marine plants bloom. But the water temperature is good all year round for snorkelers.
Overall, Ile Aux Cerfs Lagoon is the 3rd most popular snorkel dive spot of all 7 snorkeling dives in Mauritius.