Baby Upside Down Jelly Fish?

i was looking in my ten gallon nano fowlr tank and i saw what looked like a baby upside down jelly fish. I took some pictures but none of them ended up well. The jelly was about the size of a pencil eraser. I fed the tank some zooplex to hope it survives. The jelly fish probably hitched a ride as an egg on some recent macro algae i bought for the tank. Luckily there is very little current in the tank to help the jelly survive. This is for sure the COOLEST hitchhiker ever.