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In 1864 a specimen washed ashore in the aftermath of a severe storm by St Andrews, Scotland, which was more than long, longer than the longest known Lion's mane jellyfish, the animal which is often considered to be the longest in the world. However records of extreme length should be taken with caution, because the bodies of nemerteans are flexible and can easily stretch to much more than their usual length.
Lion's mane jellyfish, the animal which is often considered to be the longest in the world