Ammonite Coast (アンモナイト海岸, Anmonaito Kaigan?) is an area on the overworld in Final Fantasy Adventure.
Sumo following Cibba's instructions locates Ammonite Coast. He lands on the shores through the wooden pier and makes his way through the area, arriving in Field of Floatrocks.
Spoilers end here.
Ammonites are an extinct group of mollusks.