Tonic immobility is a tactic used by scientists to keep research as safe as possible for both the shark and the researcher. It's caused by stimulating the tiny sensory pores on a shark's snout, bringing about a temporary state of inactivity. In this case, the team brought in Iron Mike Tyson for the job! After a few rounds in the Bahama waters, looks like he’s still the undisputed champ! #SharkWeek continues every night at 8p on Discovery. | Shark Week

Goblin sharks lurk in the deepest recesses of our oceans. They have the fastest jaws in the sea--flying out at 10 feet per second! | National Geographic TV