The flat and low-lying coastal areas of Florida are generally referred to as the Coastal Lowlands. If you are looking for alternative terms or subdivisions of this region, one common term used is "Florida's Coastal Plains." Additionally, specific areas within the Coastal Lowlands may have local names or designations, such as the Florida Keys, Big Cypress Swamp, and various barrier islands.
If you meant to refer to "mini" in a different context or were thinking about another specific term, please clarify!