The “alien” is actually a potato. Specifically, it is a purple tuber nicknamed Spudnik-1, grown and photographed by Pettit.
A photograph taken by a NASA astronaut has sparked fears it shows an extraterrestrial creature, but it’s just a photo of a potato.
(Don Pettit/X) A grotesque purple lifeform was photographed sprouting 'tentacles' on the International Space Station (ISS), ...