A mermaid style of character. May need lower strength weight, around 0.4-0.6. Somewhat depends on the other loras strengths so 1 can be fine too.
Trigger words are: Mermaid, Fish girl,

Additional useful words: Blue skin, Blue hair, Blue eyes, Gills, scales, fish ears, fins, tail fin, colored underside, Iridescent scales,

Negative: feet, legs, foot, soles, barefoot,

You can have different skin and scales color. Like with Pink skin, green scales prompts and so on.