Excerpt from this story from Smithsonian:
But before long, the animal jerked against the fishing line, and Grubbs suspected the group was about to see something much stronger and rarer—a critically endangered smalltooth sawfish. This eerie, boneless creature looks like a shark with a chainsaw for a nose, called a rostrum.
“I was pretty sure this was a sawfish, but I remained stone-faced because I didn’t want to disappoint the students if I was wrong,” Grubbs says in a statement. “I saw the tail before the rostrum, so I lost my calm at that point and screamed ‘Sawfish! It’s a sawfish!’”
A century ago, such a find would have hardly been shocking. Smalltooth sawfish were common across Florida waters and could even be sighted as far as Texas or North Carolina. Young sawfish sheltered in spindly mangrove roots. But throughout the 1900s, coastal development destroyed mangrove forests along Florida’s shore. Hunters captured the animals and sold their toothy snouts, and sawfish became entangled in fishing nets. Juveniles take several years to reach reproductive maturity, making it even more difficult for their numbers to recover. By the end of the century, their population had crashed by 90 percent.
Now, sightings of sawfish are few and far between. Before Grubbs’ find, no one had tagged a sawfish in Cedar Key for three to four decades.
Having confirmed the identity of the massive creature, Grubbs and his students restrained the animal, which measured 13 feet long. Another team member went back to shore to get a tagging device, since “no one had imagined they’d need” one, with sawfish being so rare in the region, per the statement.
Scientists tagged and released the fish, which despite its shark-like appearance, is actually a type of ray. Now, they’ll follow its movements for up to ten years, collecting data that’s crucial to conservation and recovery efforts for the species.