This is a rare find indeed.
The smalltooth sawfish is one of the more endangered species on the planet. As it is estimated, only 5 percent of its once-thriving population still exists in the world. So, when a bystander just happens to catch one on film, it's sort of a big deal.
Actually, according to the comments on this video from Facebook users, seeing this sawfish seems rather common. Multiple people have posted pictures and stories of their encounters with this fish inside the Ding National Wildlife Refuge.
Thankfully, we have places like Ding that provides an area where such endangered species can still thrive and be left alone to hopefully reproduce. The outlook for this species is grim, but perhaps we can bring it back from the brink.