9 Animals With Creepy As F*** Horror Movie Powers
8. The Immortal Jellyfish

As unpleasant a thought as it might be, death comes for us all. It's a natural part of life, so when something doesn't die, we must naturally assume that it has accidentally scuttled its way out of a haunted mirror into our realm.
There is a tiny species of jellyfish found in the Mediterranean and the waters surrounding Japan called the Turritopsis doohmii, or the Immortal Jellyfish that, rather than dying, simply begins to age backwards like a transparent Benjamin Button when the time would usually come to kick the can. Then it starts all over again.
Okay, maybe a jellyfish the size of your pinky fingernail doesn't exactly fill you with dread (at least, until we figure out what they're planning), but what about a giant, biologically immortal sea insect?
As delicious as they are when they're dead, there's no denying that lobsters are gross. Granted, they are only "biologically immortal", which means that their DNA doesn't accumulate damage over time (so they don't age), but it is thought that many eventually succumb to disease eventually.
What they do do, however, is never stop growing during this incredibly long life, resulting in scuttley nightmares the size of toddlers, and don't even get me started on spider crabs.