https://trendsnews66.com/the-horror-story-of-why-shelley-duvall-vanished-from-the-spotlight/

The mysterious substance found on your wall, pinkish in color, hard, and crusty, definitely sparked some interesting theories. While your landlord suggested it was sealing foam, the sudden appearance and texture raise the possibility of something less conventional.

One intriguing theory is that it might not be a material at all but instead connected to something organic—perhaps related to a reptile or amphibian. Some species, especially in tropical or subtropical climates, leave behind strange residues that might resemble this. For example, certain types of geckos or frogs can excrete unusual deposits, such as egg masses, that harden and crust over. These might appear in odd places, such as on walls, especially if a small gap allowed the creature access. Given the growth-like appearance, it’s possible the “mystery growth” could have been a deposit of some sort—perhaps eggs or excrement—that dried out in the heat.

Additionally, some reptiles, like lizards, have been known to leave behind their shed skins, which can sometimes look almost foam-like once they dry out. Amphibians, on the other hand, might leave behind egg sacs, which can resemble pinkish jelly-like masses at first, eventually drying and hardening. While these occurrences are rarer in typical indoor environments, they aren’t impossible, especially if your building has easy access for such creatures through small gaps or cracks.

In some humid environments, similar growths can sometimes be fungi, especially in climates like Queensland’s. However, this specific occurrence lacks the typical features of fungus—such as a soft texture or visible spores.

Without further investigation or recurrence, it’s hard to say definitively what the substance was. If it reappears, it might require more attention to rule out potential issues like leaks, fungal growth, or even hidden gaps in the wall structure.