It’s a jellyfish. I have never seen one like this. And I have never seen one here on the reef till now. I was following my dive buddy and he swam over it. He said he’s seen them and thought nothing of it. Well I saw it move unnaturally to the current. So I poked it. Sorry. And it moved. So it was alive. Now I lifted it? And I could see the sucker pulsating. It didn’t have tentacles and it wasn’t translucent. But otherwise it behaved like a jellyfish. So I got my first shot of a jellyfish. Looking at it on the sandy sea bottom, it really didn’t look like much of anything. It’s a moon jellyfish in the guidebook.