Last weekend while out discovering the southern coast of Wellington I happened across these blue bottles, presumably washed ashore during the massive swell during the week.
Bluebottles are also known as Portuguese Man of Wars and can inflict a nasty sting with their very long tentacles. While I got very close I made sure I didn't touch as even when on land they can still sting.
It wasn't until I looked at the photos later that I noticed the little green stitches on top of one of the bottles. They were so delicate and almost looked like tiny sutures.