Dr Steve Simpson, from the School of Biological Sciences at Bristol University, told the Daily Telegraph: "It's very intriguing, I don't really know what to make of it."There is a possibility that it is a special type of jellyfish or a marine salp. It's very unusual and I haven't really seen anything like it before though.
Alex Gordon-Lennox, 22, said: "I've never seen anything like it before. It looked a bit like a jellyfish or a squid or something. "
Glyn Barnes Now if its an alien, what on earth why on earth would it come to Bristol Harbour in December?