Most Helpful Girl
No, I don't.
The world doesn't owe you minority anythings. Although undines are common mythical creatures in many cultures, the reason white women are depicted as mermaids is because the pop culture mermaid is largely based on the Hans Christian Andersen story, a Danish author.
If you want a minority character as a mermaid, go ahead and write that story. Nobody's stopping you.
People need to realise that writers don't write their stories to intentionally exclude a class, gender, race or whatever. They write about things they're FAMILIAR with, what THEY can RELATE to.
You will see this pattern everywhere. Most female authors will have a female protagonist, whereas most male authors will have a male one. Whichever culture the author grew up in will influence the setting of the story. If the author had a miserable life, it's more than likely their stories will be sad and depressing.
If you want a minority character, look for minority authors.
Most Helpful Guy
How common are mermaids in pop culture in the first place?
Only big mermaid I can think of is Ariel, and that's an adaptation of a Danish story right?
So in short, no I don't think there's an issue here.