We went hiking with friends. Suddenly, we discovered this on a tree. We looked at it from different angles, but we still couldn’t figure out what it is.

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It looked wrong. Alien. Wet, red, and pulsing against the forest floor like something that had no business being there. For a moment, we honestly thought it might be alive in a way we didn’t understand. A parasite? A mutant? Some unknown crea… Continues…

It took a few anxious minutes, some zoomed-in photos, and a frantic search before the mystery finally cracked. That unsettling red shape, surrounded by odd little structures, wasn’t a parasite at all, but a Red Triangle Slug (Triboniophorus graeffei), a species native to Australia’s east coast. Its strange, triangular marking and vivid colors make it look more like a horror prop than a harmless land slug.

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