Thanks fellas. Eddie. Some here think stingray also.
I do a drawing of what I remember. Wish I had my camera that day.
What the heck is a "scute"? - Fossil-Treasures-of-Florida.com
www.fossil-treasures-of-florida.com/FossilTreasuresofFlorida...
People often ask me what the heck a “scute” is. Basically, it is a boney plate that floats in the skin or is a part of a carapace shell of some type. “Scute” is taken from the Latin scutum or scuta, meaning “shield”. It is, also, called a dermal occicle or osteoderm and can form dermal armor. The shape is usually a round or square boney plate with pits in it. Each scute has unique markings telling us what kind of animal and often what species they came from. They frequently fossilize because of their boney hardness and often survive when the rest of the animal does not. Most commonly found in Armadillos, Crocodilians, Turtles and Tortoises.