Death by world's longest animal

Zoologger: Death by world's longest animal - life - 01 September 2010 - New Scientist: "A venomous medusa-like beast as long as a blue whale has emerged as an unlikely defender of the world's oceans.

The lion's mane jellyfish is the largest jellyfish known and a contender for the longest animal of all time. Its bell can be 2.5 metres across, and its tentacles can stretch over 30 metres – about the same length as a blue whale. This is 10 metres longer than the tentacles of the famous Portuguese man-of-war – which in any case is not a true jellyfish but a hydrozoan."