I’ve lived on these waters my whole life, as has Mr. 4th, and we have never seen this. This one is bigger than a golf ball & smaller than a tennis ball. There were also miniature ones, really small, but I didn’t get a peekture.
I saw them on a sandbar at low tide in a North Eastern saltwater estuary. The estuary feeds into a large bay, then the Atlantic Ocean.
I Google Imaged & just plain Googled many variations of word groups and came up with nothing. What the hell is this???!!!
Here, have a Hermit Krab fight for your trouble: