The city was built over the land (and quiet protests) of the fungally-adept "graycaps", humanoids of uncertain disposition. The inhabitants of Ambergris enjoy a fascination with squid, and celebrate an anarchic annual Festival of the Freshwater Squid.
The city was built on the land occupied by the graycaps, enigmatic humanoids with unique abilities related to fungi. The residents of Ambergris are fond of squid, and hold an unorganized yearly festival dedicated to freshwater squids.