Mermaid's lower body type - Original Fish Body Type

This shape is fish body types more specialized version in underwater. her body shape is only aquatic life style.
so, she is not free on the water. (maybe she don’t have respiratory organs of land)

※ I talk about mermaid’s fish body type. so, don’t talk about her fins and gills type this part.
※ I'm sorry, but my english language speech is very not good well. so, maybe discomfortable to reading my explain.
please look at the context and understand yourself.
thank you.