Calusa is an extinct Amerindian language of Florida. No records of the language remain other than a few place names in Florida, so it is unknown which language family
Calusa might have belonged to. Although the Calusa tribe was once extremely powerful (defeating the Spanish on numerous occasions) and technologically advanced
(building canals and artificial islands), they were devastated by European diseases and the tribe essentially disbanded in the early 18th century. Most of the survivors
joined the Seminole tribe or went to Cuba, and their language was never written down before it vanished.