Electronics don’t work in water.
Melusine had a “dry room,” where she kept her Xbox, her computer, her television, her cellphone. The glow from her monitor and a collection of LED lights illuminated the cave walls in blue and green and pink. She would run a nice bath and watch Netflix or play games from the tub. She ordered sushi takeout from Uber Eats and ate it in front of her monitor, working for hours on her website—social media for merfolk.
The internet latency was terrible. Not enough to go to the sea witch and ask for legs, though.