Hooked scientists accidentally caught a huge fish-saw
Scientists from the University of Miami doing the usual work - studying sharks, put beacons on sailing dolphins and other large marine life. Imagine their surprise when the hook caught a huge disappearing and entering into all possible books sawfish.
Poachers would not miss the chance to get rich, but honest scientists have selfie with fish-saw, measured it (turned out to be 420 cm.), Removed the hook and released.