Two Lion's Mane Jellyfish Marblehead, MA

I was paddling my kayak and spotted two red/purple jellyfish in the water among some seaweed along the rocks. They were both hubcap-sized. I had no idea what kind they were but from the description of color, the "eight pointed star", and the region, I believe these were Lion's Mane Jellyfish. I have three pictures of it but it would only let me upload one.