Bluebottles, also known as Portuguese Man-o'-War, are a bizarrely unique colonial organism. This means that it's like a team of animals which have to work together to be a single bluebottle. Bluebottles are made up of four different specialised types of creatures to obtain Jellyfish-like tentacles that hang behind its nitrogen-filled bladder, which acts as a sail. As summer comes, sea temperatures rise, along with the risk of bluebottles' venomous sting, which is incredibly painful to humans and can leave a whip-like mark for days.
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australiangeographic.com.au/australian-bluebottles