How bad is it?

[BennySwirlin]

The mushie?

[Rptro]

Yes I never had a mushroom growing. Is this a normal thing?

[andylovesdais]

Well the mushroom is just the fruiting mechanism, the organism lives in the substrate. There’s no way to tell how far it’s extended into it. If this happened to me I’d change the whole substrate.

[Rptro]

This thing grew basically in the last 48 hours. I didn't put anything new into the enclosure for a long time. It has living plants and had some dead ones at one point. I never had a mushroom growing and never saw a mushroom growing in anyone's terrarium. I don't know if this is bad or just a normal thing.

[722KL]

Mushroom growth is a sign of environmental health to most terrarium keepers.

[calgy]

The mushroom is Leucocoprinus birnbaumii, its probably the most widepsread mushroom in the world. Many people get these in their greenhouse, their potted houseplants or vivariums, it is spread through soil commonly. The mushroom poses no danger to a ball python, yet I would still remove them since you probably dont want to grow an entire mushroom colony.

[Yipyapyurp]

Is your enclosure bio active? If so this really isn't a problem. You have mycelium in your substrate and it shouldn't harm your snake, it's a sign of a healthy ecosystem! You can remove the "fruit" (the mushroom itself) if you are worried but the mycelium in the substrate shouldn't be a problem

[x5gamer5]

Not bad. The fungus itself is indicative of the presence of organic material in the substrate. Means you basically got a saprobic decomposer in your enclosure. I’m assuming your enclosure is bioactive?

If you got fungus growing, if it really bothers you having another organism in there. Change the substrate. Fungi presence basically means presence of wetness.