Fantastical, whimsical, painterly, mermaids, (underwater kingdom:1.5), magical underwater world, (mermaiden:1.3), sea anemones, jellyfish, shells galore, kelp forests, treasures chest, glittering scales, soft focus, oil paint texture, dreamlike mood, warm color palette, Disney princess style, watercolor media, pastel-like, delicate, elegant, fairytale setting, f/8, HR., vibrance., Underlighting, Colorless, Vaporwave, rich bokeh, Visually flawless by: Brent Heighton, Edmund Dulac
Mermaid queen (underwater  kingdom:1.5):