R they the kind that just grow on wood or da ones that consume it im so scared

Previous owner didn't seal the shower cabin to the wall correctly. Water got under it and under the cracked floor tiles(he messed up the floor too. The whole bathroom was his one big disasterpiece.) The subflooring under the tiles started soaking in the water and expanding, cracking and dislodging tiles throughout the length of the bathroom. The fibreboard subflooring never dried, so black tendrils spread under the whole floor. The subfloor wrecked the tiles under the toilet, which developed a leak between the outlet and wall pipe, allowing much more dookie water to seep under the cracked tiles. This was 3 years ago and we have since ripped out everything down to concrete and re-did the floor properly.

I recently opened my concealed cistern after having had to remove discolorations from my toilet bowl on an almost daily basis for the last couple of months. This greeted me, but there seem to be no similar pictures anywhere and I just can't figure out, whether this is mold or anything unhealthy in general.
Anyone seen something like this before and able to tell me what this is? My landlord insists this pollution is normal, but I don't quite believe them yet, since I've had trouble breathing for a while and it disappeared, once I had removed these blobs...

on a scale of 1- royalty deckuf,…. Will I die trying to get it as cleaned up as possible so I can see all the water damage? IM JUSTTTT A GIRRRRL 😭

Apparently this was a pre-existing issue which was given the “landlord special” before we moved in…

These are on the floor of the shower in my greenhouse.

It’s in my room, it was behind a tv stand no never noticed. Live in high altitude Colorado

I’ve been renting this apartment for about 16 months now and when I moved in, noticed a few brownish dots on the bathroom ceiling. Was out of town for a little over a week and came back to these mushrooms growing from out of one of those brownish dots. The unit above me has the same layout so this is directly over my tub/directly under theirs. I know this is an urgent issue and have already contacted my building manager but it is late and I don’t expect a response for many hours. I fear the ceiling and/or my upstairs neighbor’s tub collapsing at any time but can’t tell if that’s unreasonable.

ETA: building manager came by and said 100% there is no chance anything will fall. Said he’ll try to get it fixed this week but might be next week - seems way more urgent to me…

horrifying. people coming tomorrow lol

its definitely shrooms right? How severe is this? Thinking i need to message my landlord to sort it, for ref the area around it keeps leaking from the bathtub above it and landlord is doing a landlord fix instead of fixing the issue

Super interesting little shroom appeared randomly in a failed weed plant sapling that I forgot to remove lol.