Photo of the Day: Ghost sharks might look like the things nightmares are made of, but they aren't exactly screaming "boo!" at unsuspecting humans. They're rarely seen, and even more rarely caught on camera. Happy #Halloween from our ghostly friends to you! . . . #POTD #photooftheday #picoftheday #Halloween #Halloweek #SharkWeekEveryWeek #ghostshark #ghost #boo #nature #naturephotography #wildlife #wildlifephotography #spooky #strange #strangerthings #strangerfins