(medium full shot) of (enigmatic pink aquatic creature) with iridescent skin

(medium full shot) of (enigmatic pink aquatic creature) with iridescent skin, shell-like armor, tentacle-like fins, multiple eyes, tail, luminescent eyes, ethereal bubbles, set in a dark underwater cavern, with eerie light, shadowy corners, mysterious echoes, hidden secrets, during twilight, ,Masterpiece,best quality, photo, realistic, very aesthetic