I love to watch nature documentaries and the like on PBS, but most of them go over information that has been rehashed a million times. But just when you get complacent, you realize that there are still things out there which are big and yet largely unknown. One of the most unusual is the Oarfish, Regalecus glesne. Besides being huge (reported lengths of 17 meters, verified lengths of 8 meters), the oarfish has a beautiful silvery body and a long thin shape which is very odd.
It has been photographed by Jonathan Bird, and also by Navy divers (who caught it on video!).
I also recall seeing video of a barely alive specimen that washed up on the beach, but wasn’t able to find it online.