Photo credit: Animal Planet Though easily identified by it's toothy nose, or rostrum, the sawfish is an elusive and poorly understood denizen of the world's tropical rivers. It's also critically endangered and under continued threat by poaching and commercial fishing bycatch. Extreme angler, biologist, and host of Animal Planet's River Monsters, Jeremy Wade, traveled to Australia—one of the few places in the world that still has a notable population&mdash...Read the full story on TreeHugger