This is one cool animal. I caught one once off the shores of Coronado Island in California. It was really funny. We weren't catching anything and then my little brother had jams from IHOP and he asked if he could dip a sardine in the jelly. We all laughed and said whatever. We caught three fish, all with jelly. Moral of the story--fish with IHOP jelly.
It was really cool. It looked like a mini-sting ray. But it actually is in its own family.