17. Fanfish Seadevil
Yes, this fish is actually named the seadevil and I’m guessing you can assume why. This is one of the earth’s most terrifying creatures and thankfully, they’re extremely hard to spot so you won’t likely run into one of these. Their survival tactics are also quite terrifying because when mating, the males fuse to the females, essentially living off of their blood streams for the remainder of their lives. Talk about clingy…