" Mermaid queens didn't often have a reason to move quickly. There were no wars to direct, no assassination attempts to evade, no crowds of clamoring admirers to avoid among the merfolk. In fact, slowness and calm were expected of royalty.
So Ariel found herself thoroughly enjoying the exercise as she beat her tail against the water- even as it winded her a little. She missed dashing through shipwrecks with Flounder, fleeing sharks, trying to scoot back home before curfew. She loved the feel of her powerful muscles, the way the current cut around her when she twisted her shoulders to go faster.
She hadn't been this far up in years and gulped as the pressure of the deep faded. She clicked her ears, readying them for the change of environment. Colors faded and transformed around her from the dark, heady slate of the ocean bottom to the soothing azure of the middle depths and finally lightening to the electric, magical periwinkle that heralded the burst into daylight.
She hadn't planned to break through the surface triumphantly. She wouldn't give it that power. Her plan was to take it slow and rise like a whale. Casually, unperturbed, like Ooh, here I am.
But somehow her tail kicked in twice as hard the last few feet, and she exploded into the warm sunlit air like she had been drowning.
She gulped again and tasted the breeze- dry in her mouth; salt and pine and far-distant fires and a thousand alien scents. "

― Liz Braswell , Part of Your World (Twisted Tales)