Lagoon
The lagoon (TeNamo in Tuvaluan) of Funafuti atoll has a north-south length of 24.5 km, and east-west 17.5 km, with an area of 275 km², making it by far the largest lagoon of Tuvalu. It is up to 52 metres deep, but has several submerged rocks and reefs that are coming as close as 6 metres to the surface.
Read more about this topic: Funafuti