The Bluebottle or Pacific Man-of-War is not a single animal but a colony of four kinds of highly modified individuals (zooids). The zooids are dependent on one another for survival. It’s not a true jellyfish.
Well, I never … I just read this and more interesting facts about them here!
We found this one washed up on a beach south of Scamander on Tassie’s East Coast. Image taken with Olympus 60mm Macro.