[BuyMyBitcoins]

I wonder how oceanic life would be able to record information. If we assume that extraterrestrial oceans would have lifeforms similar to corals and barnacles, how would an aquatic civilization prevent written information from getting encrusted with biofouling or keep it from corroding away?

[chromanoid]

there are so many ways to record things... for example https://en.m.wikipedia.org/wiki/Quipu maybe the need to keep it clean just makes it more important to a society...

[LargoLasskhyfv]

By using strings of pearls on fishbones. To the effect of something like this: https://en.wikipedia.org/wiki/Quipu

Or selectively breeding barnacles to make longlasting letters/symbols, or 'milking' their glue and put it on something to avoid being overgrown. Imagine an aquatic market for underwater fonts!1!!