I'm... pretty sure being the ocean would totally count.
I mean, one of my friends back home is invisible... that's pretty close?

[No, not really, but she's giving it the old college try.
One of her jacks lifts a bit, moving a bit like a snake. Hovering like that in front of Venus's wing.

Mostly just to watch if her eyes track them because they're cool and weird and neat.]

As long as it's something a base human wouldn't have, and you can't turn it on and off... that'd be a mutant-type Quirk.
Like with Earphone Jack; I can reel them in, but I can't get rid of them.

Not that I'd want to, obviously.