A Bug Trying To Write A Book

Story thought: Scaled individuals be them Merfolk or of the reptile variety may have scales appear anywhere on their bodies. Most notably they appear along their spine, shoulders, and face (normally around the eyes).

Story thought: In cities both fresh water and salt water "Merefolk" live side-by-side, how? The city has the salty water of the ocean running though its canals, so while those of the salty variety can not live in fresh water, it is the fresh water folk who are actually of the euryhaline species. They can freely live in any kind of salinity.

Story thoughts: Huldra and Huldrekall are interesting beings. I'll have to do more research, but I like the idea of a kitsune and a fox-tailed Huldra coming together over their beautiful tails.

Story Thoughts: Merfolk are omnivores, eating kelp to fish. Their diet also varies depending on their location (i.e. lake, river, ocean, sea). Merfolk tend to have a thin layer of skin between each finger to aid with swimming. While below water a second eyelid protects their eyes, this layer when hit with light reflects an iridescent like light back. Also pictured are what gills would look like if no scales are present. And finally how mermaid scale look. Some are more uniform in color, but generally look this way in texture.

New here, just trying to figure out how this works and going through the tabs when I see this. Should I be worried?