Mold in my flask!

[Lordoftheswarms]

I bought some flasks at the annual orchid show in my area. I rarely look at them as they were gradually growing and otherwise not changing much. I looked at them just now, and one of the two has mold growing on the media, and has surrounded two plants that look pretty happy.

What do I do? Do I open it, and remove the mold, or do I leave it be?
Thank you in advance for your responses.