I have to confess that for some reason the album art never shows up when I play this album in iTunes, and I don't own the vinyl, so the cover art rarely occurs to me when I listen to the album. The music seems more tranquil and...aquatic than this cover would make you think. It's also a more accessible record than her new double album, but I'll get to that eventually.
I feel like the lighting is what makes this cover work. If it were better lit, it would look like a silly little girl in a Halloween costume pouting at her parents. But with some haze and darkness going on, the little girl becomes a figure of uncertain menace, like coming across Bigfoot in the forest and being unsure how afraid you should be.