The Purge

And plastic bags keep them from being able to vomit out the water.

Isn't nature beautiful
Yeah, but think of the CEOs! What would happen if they didn't buy a new supercar each year at least?
- Aww, shit. I've been using the same ALDI bags for years now. I guess they'll have to cut back on their avocado toast. 🤷‍♂️
They generally expel the water out the nostrils so drinking straws love to get lodged in their noses. Then they slowly die of starvation. Isn't life beautiful?

This would have been a useful upgrade during Uni...

So do they just have no gut acid? How quickly does that regenerate if you’re giving your stomach a seawater oral enema every time you eat.

Well, our stomachs are not at full acid all the time, only when we eat. I imagine it's pretty similar.
turtles, because of the jellyfish they eat have very thick eosophagus lining, i assume thier stomaches are equally touch.

Wouldn't a reverse filter mix things together

I think a reverse filter would only let large particles through while retaining the ones to small to pass through it.
- That's still just a filter. A filter is something that separates and divides a mixed group into specific categories. So a reverse filter would be the opposite of that. Something that takes separate groups and mixes them together.
- So size exclusion chromatography

Now that's classy

So if they can’t swallow something do they just die

An odd dragon

Sspine doesn't make sense here at all. I assume OP meant esophagus/ gullet.

It says spines, rather than spine. The esophagus is covered in spines (think like the spines on a porcupine, not a backbone).
Seems like they meant spines to me? As in those little spikey spines pointing backwards down the esophagus?

Reverse filter is a strainer or sieve.

Strainers and sieves are filters. A filter is a filter. A reverse filter is still a filter. Direction doesn't make a difference because direction is subjective.
- Direction matters in what you keep. A filter you keep the water. A strainer/sieve you keep the contents. Direction does matter, that's why the comic has to specify reverse filter. But it's a poor choice of words because reverse means it's a strainer/sieve.

I bet theres still always carrots in it.

Wouldn't check valve be more accurate?

It only stops solids above a certain size, so a filter is more accurate. Check valves generally stop everything or all of a class of things, the turtle passes all liquid and some solids

Our heart valves are check valves
- A class of things = large solid objects like jellyfish and food?

That must feel so good