This is a small stingray without a stinger. Not sure why. Maybe its to young or its a different breed.
I'm not sure what this is in the last photo. I put it in a gallon zip lock bag to examine it. I stepped on it and it felt squishy. Its about the size and overall shape of a flat baseball. This is a view from the top those flaps fanned to slowly propel it in the water. As I touched it or moved it around it inked. Anyone have an ideas what it is?