Mold in the shower? Please help with the assessment

Hello everyone,

there is a larger gap under our shower. Below it looks very black, does anyone know about this, is it mold? Could it be something else? What would you say, does the shower need to be removed? I was a bit confused by the clear "border" of the black in one of the photos.

Thank you very much in advance!

PS: Sorry, the photos are unfortunately poor, it’s not possible to get a proper angle with the camera.

The problem is not so much getting close, but that a photo from further away is missing, where you can even begin to place where this spot is supposed to be.

That's how it is: first an overview, then into detail. And preferably with a scale. Or a reference.
Looks like the object here was rotated a bit? Are those floor tiles or wall tiles?

By the way, mold can be easily recognized by its spores, more like speckles.

Okay, I thank you already, I will take one or two photos later.

Is that the shower tray from below? If yes, they are mostly coated in black, so no mold. However, there should be no gap.

So now the complete photos again.

So rather no mold?

Do you think the gap is problematic?
I think it is there because the floor in the house has settled a bit.