A frog in India has a mushroom sprouting out of it. Researchers have never seen...

[MrMoyb]

I almost cannot believe that a professional ecologist would not have collected that frog for further study.

The fruiting body is protruding from the frog at an odd angle -- forward, instead of upward as might be expected. I suspect that the mushroom is attached to a small piece of wood that penetrated the frog's side following a hard contact. There seems to be no involvement with the surrounding skin or tissues, so it seems very unlikely to be actually growing on the frog.

I'm also a frog and fungi enthusiast, and that was my thought exactly.

The skin doesn't look irritated at all, so a tiny piece of mycelium-saturated debris must have just barely stuck on/in the skin and gave rise to a fruiting body. Or maybe the debris was embedded a while ago, the acute inflammatory response had long since passed, and as the frog's body pushed the encapsulated offender out the exposure to air triggered fruiting?

At least, this is the convoluted story I tell myself so I don't have nightmares about a frog-zombie apocalypse.