Fans Share Things About The Most Horrifying Sci-fi Creatures We Never Thought About Before

List Rules
Vote up the things that remind you why you don't want any sci-fi creatures at your next birthday party.

Nobody likes to have uninvited guests to your birthday party, especially when they're horrifying and deadly sci-fi creatures. For starters, they probably smell terrible, and even worse, there's a chance they might infect you with a baby parasite that will grow in your stomach. But, birthdays aside, these creatures play a large role within the sci-fi genre, and fans love talking about why they love or hate them. Here are some of the best posts shared by fans about sci-fi creatures we never thought about before.