How mermaids watch news live on TV underwater if conductivity of sea water affect electromagnetic signal?

Unless of course the mermaids can use "super" low frequency like our subs, but wouldn't the quality become poor. How can the mermaids enjoy 4K quality digital TV programmes much like us without laying cables all over the sea floor? They share similar technology with us in the 21st century CE.

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How mermaids watch news live on TV underwater if conductivity of sea water affect electromagnetic signal?

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