Which of the following animals cannot swallow a human?

A whale shark’s esophagus is approximately the size of a quarter. Being filter feeders these huge animals ironically consume incredibly small food.

The large size of a whale shark mouth allows it to take in a great deal of water, which is not actually swallowed but filtered through. It allows a better chance of collecting large amounts of food. Whale sharks are filter feeders and won’t eat any humans they encounter.

They feed only on plankton and very small fish. As you have probably gathered by now, even though it is technically possible to survive being swallowed by a whale, it's extremely unlikely. But luckily for us, whales are generally not that interested in humans. If you are going to worry about anything eating you in the water, it should probably be sharks.

The only whale that would likely be capable of swallowing a human would be a toothed whale, the sperm whale, which eats prey such as giant squid. A sperm whale did ram and sink the whale ship Essex in 1820, but there are no reliable reports of a sperm whale ever eating a human.