hey /x/. weird thing i noticed at the beach like 6 years ago

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hey /x/. weird thing i noticed at the beach like 6 years ago has been on my mind again recently so i decided to see if any of you know something about it

long story short, was walking down a path by the beach that has a lamp post every couple of meters. there are all these little red and blue glass bottles placed beneath each post. obviously they werent usually there, at the time i visited the beach pretty much daily. i also notice these weird transparent blue orbs covered in netting, floating in the ocean

anyway, i walk back no more than 40 minutes later and all the bottles are gone. weird orb things are gone too

probably something really benign like an art installation or something but it still baffles me