[lechacker]

Water isn't blue, it's transparent

[jefftk]

Water is blue, just like air is blue, just like blue-tinted glasses are blue. They disproportionately absorb non-blue frequencies, which is what we mean when we call something "blue".

[22SAS]

My bad! Should've said "water is wet" or maybe run my response through ChatGPT, maybe that'd have caught it and offered a replacement!

[thro1]

Not really - there are blue and blood red oceans, but you might never hear about it (there is a book about it and strategy worth to read).