Interesting. Free colon cleanse. Now we just need to find the beetle species that can perform the same feat in humans.

Maybe the same beetle would work. Has anyone tried?

A human has a much longer gut.

Sure though the deadliest part, the stomach, is not that long.

Granted, but I'm thinking more about how long the beetle can survive without access to air.

That's an aquatic beetle, a lot of those store their own air supply under their wings...

Oh, I didn't know that! I can't get to the citation, but per Wikipedia [1] Hydrophilidae, the family in which this beetle is classified, do have that capability. Whether even with an air bubble they can hold out long enough is a separate question, as is whether their also-mentioned ability to extract usable oxygen from ambient water would be helpful in this environment - but being able to carry air under their elytra would certainly improve their odds.

[1] https://en.m.wikipedia.org/wiki/Hydrophilidae

I guess you've never eaten boiled corn grains

Have you ever had an itch that you just can't reach?