I saw something just like that a long time ago when I was in High School chemistry class. (This was a LONG time ago! LOL) We had lab stations that were "ours" for the duration of the school year, so we kept some things in the drawers that no one else messed with. We had a beaker of distilled water left over the weekend in our drawer. The beaker was perfectly clean when the water was put in it. I don't remember why it was left there, but when we came back to school on Monday, that perfectly clean, clear water had what looked like a jelly-fish blob floating in it. It was actually pretty cool. The chem teacher (who was actually a biology teacher by profession and taught chem because no one else would) said it was probably some kind of bacterial bloom.
Anyhow...just wanted to point out that it can happen even under very clean conditions. So it's not surprising to find something like that in a snake enclosure, even if it's kept clean and tidy.
I'm glad Skiploder knows more about it than I do!![]()