If a fish has the word "devil" in its name, it's a safe bet that it's going to be freaky. The seadevil anglerfish does not disappoint — it features a whole list of fascinatingly strange characteristics.
It's hard not to start with the seadevil's looks. As its name strongly hints, this is a fish that could've swum up straight from hell, with its misshapen body, razorlike teeth and cold death stare. Although they're bizarre and scary looking, at least they're not huge. Females generally top out at 8 inches (20 centimeters) long. The males are much smaller, at maybe an inch (2.5 centimeters) long.
In a strange evolutionary twist of reproduction, the males actually fuse themselves to the females. Their fins, teeth and eyes disappear, along with a few internal organs, ultimately turning the two individuals into one. What's left of the male's body essentially becomes a storage tank for sperm that will help fertilize the female's eggs when the time is right.
As an anglerfish, the seadevil doesn't dart after it prey. Instead, it has a protrusion from its forehead that dangles a glowing lure to attract starstruck, luckless animals. With its huge, gaping jaws, the seadevil can actually devour creatures larger than itself.