The Indian River Lagoon was originally known on early Spanish maps as the "Rio de Ais," after the Ais Indian tribe, who lived along the east coast of Florida. An expedition in 1605 by Alvero Mexia resulted in the mapping of most of the lagoon. Original place names on the map included "Los Mosquitos" (the Mosquito Lagoon and the Halifax River), "Haulover" (current Haulover Canal area), "Ulumay Lagoon" (Banana River) "Rio d' Ais" (North Indian River), and "Pentoya Lagoon" (Indian River Melbourne to Ft. Pierce)