Casco Bay was named "Baha de Cascos" by Portuguese explorer Estvo Gomes in 1525 but named Aucocisco (place of herons) by the Abenaki, a Native American tribe and First Nation.
The Portuguese explorer Estevao Gomes, mapped the Maine coast in 1525 and named the bay "Bahia de Cascos" (Bay of Helmets, based on the shape of the bay). Aucocisco is the Abenaki name for the bay, which means 'place of herons' (sometimes translated as 'muddy'). The Abenaki (Abnaki, Abinaki, Alnobak) are a Native American tribe and First Nation. 
