Jellymen
Jellymen are a species of jellyfish humanoids on Thia, they have organs just like a human, but they are stored behind the jellymen’s tentacles. Jellymen have at least 200 tentacles, and if someone were to shoot or stab them, they can simply move their organs out of the path of the bullet. Their organs are really just hanging there and are held up by the tentacles of the Jellymen. This also goes for the veins, the brain however, is not immune. This is because the brain has no skull and is in the head of the jellymen, which is not made of tentacles, so they can’t move the brain out of the way.
Jellymen spend a lot of time swimming around in the oceans of Thia, and eating shrimpets.