No! Electrolytes! The bane of every shipgirl (and stuff made from ferrous metals) alive!
(Not including seawater.)
Such a misfortune!PocariA Japanese soft drink and sports drink brand.
Sauries have come to attack!
The original picture, which is actually depicting dolphins not sauries, is drawn by famous Japanese illustrator Komatsuzaki Shigeru published in a book named Naze Nani Gakushū Zukan(なぜなに学習図鑑), in 1970s. It later becomes a meme for its absurdity.