What It Might Physically Feel Like To Be Swallowed Whole

Unsurprisingly, the sensation of being swallowed whole is poorly documented. This is largely due to very few animals having a throat wide enough to accommodate an adult human, and most big-throated animals killing their prey before swallowing it. The big-mouthed boa constrictor, for example, famously crushes and kills its victims before eating them, and crocodiles practice a "death roll" to break up their meals into bite-sized chunks. In fact, the sperm whale is the only animal that consumes live, human-sized prey whole without killing it first. If you want to know what it feels like to be swallowed whole, you'll have to find a hungry sperm whale.

Of course, humans aren't normally part of a sperm whale's diet. Sperm whales have specialized mouths, throats, and stomachs that allow them to swallow giant squid and other deep-sea giants whole. If you were ever preyed upon by one, a sperm whale would first roll its tongue back to create a suction force pulling you into its mouth, then, its lower jaw would snap up. As teeth the size of large bananas stab into your torso, you would probably feel a sensation of total immobility. Sperm whales don't have prominent upper teeth. Instead, their lower teeth fit into slots on the roof of their mouths that pin prey in place.

Once trapped in a sperm whale's mouth, the next step is the actual swallowing. Sperm whales don't swallow by flexing muscles in their mouth walls. Instead, they rely on negative pressure generated in their esophagus. Their hyoid bone, the free-floating bone near the throat that gives us speech, snaps backwards like a piston. The resulting suction pulls prey directly into the first chamber of the whale's stomach, swallowing them whole.

Assuming you survive long enough to be swallowed by a sperm whale, the next phase of the journey is arguably the deadliest. Sperm whale stomachs have four chambers. The first is used to slurrify food into digestible sizes, kind of like chewing food after its been swallowed. Its thick muscular walls flex and roll to crush squids into a goo, disabling use of their beaks and ensuring their suckers can't inflict internal damage. For a person, the experience would feel like being kneaded by the world's strongest baker or rolled over repeatedly by a steamroller.

After being crushed into a pulp, you would then pass to the second stomach chamber. Here, the actual digesting begins. Stomach acids and enzymes would slowly eat away at any protective gear that had saved your life up to this point. Once it penetrates your skin, the whale's stomach acids would denature the molecules that make up your flesh. As the acid reaches your nerve fibers, the experience would become indistinguishable from that of being lit on fire. You would eventually dissolve into a soup of flesh, bones, sea water, and sperm-whale stomach acids, and your consciousness would dissolve with it.

And so, being swallowed whole is a journey that ends in death by dissolution, which is probably preferable to death by cigarette snail. To extend the hypothetical scenario further, you'll have to imagine what it physically feels like to die (according to science). For now, our only first-hand accounts of getting gulped up by giant sea creatures comes from a few unlucky seafarers who were promptly spat out. No one has ever been fully swallowed and lived to tell the tale. Perhaps it's best that way.