[1] It drains into the Atlantic Ocean through shallow channels between the Ehotilé Islands that converge at Assinie-Mafia, where Assoindé Lagoon also connects from the west.

[1] Salinity in the lagoon varies with rainfall and peaks in March and April.

The southern part of the main Aby Lagoon has the highest salinity, while the areas near the mouths of the Bia and Tano remain fresh throughout the year.

[4] The main crops in the surrounding area are coconut, oil palm, banana, cocoa and coffee.

They also form part of the Ramsar site of Iles Ehotilé-Essouman, which covers 272.74 km2 (105.31 sq mi) of the lagoon and surrounding areas.