San Diego Demon? This ain’t my first trip down Possum Trot Road

Ever since we started tackling marine cryptids (not to be confused with real cryptic species) during our annual Week of Ocean Pseudoscience, people occasionally e-mail me with new “rotting rodent” style monsters. This news story – Behold: The San Diego Demonoid – has been making the twitter and e-mails rounds today. Like the Montauk Monster a few years back, a waterlogged, decomposed critter washed up on a beach, this time in San Diego, and people unfamiliar with what decomposing varmints look like branded it some sort of cryptid. To the right is the uncredited photo (now credited to Josh Menard) that’s been cropping up in various corners of the internet. Like many “cryptic critter” photos leaked to the press, the ones associated with this story fail to show the entire animal or provide any sense of scale. That should be red flag #1 that it is, in fact, a common local resident that is being dressed up to appear more monstrous than it really is.

Now, I’m not a marsupial specialists, but I’ve seen my fair share of possums (Opposums for our non-southern readers) in all states of decay, so those nasty teeth immediately clued me in. Here’s a possum skull (from a Virginia possum) for comparisons:

possum skull by Dawson at en.wikipedia

possum skull by Dawson at en.wikipedia

And here, just for good measure, is a juxaposition of a dead possum’s head on top of the original photograph:

Sorry folks, this one is just an old, waterlogged, partially decomposed possum.


  1. Albert · February 2, 2012


  2. Alan Dove · February 2, 2012

    I’m pretty sure the same critter is the source of the “giant sewer rats” legend in New York City.

  3. Brian Reardon · February 2, 2012

    sweet photoshop job you’ve got me sold…

  4. Wilson · February 2, 2012

    those teeth of your “possom” aren’t even NEAR the same size Goob!

    • Southern Fried Scientist · February 3, 2012

      Actually, if you look at the skull, they’re exactly the same proportions. And what is a “possom”? Is that anything like a possum?

  5. Erica · February 10, 2012

    is that anything like an opossum?

    Actually, as a San Diego resident, I have to disagree with the “lack of scale” statement. While not perfect, anyone who has walked along the beach here knows the “typical” size of the kelp blade and float that washes up. Looking at those bits and then the picture, my initial inference was “medium-small sized dog.”
    Sure kelp structures can vary, but take a look at a typical San Diego beach, and you know that your “monster” could be dealt with fairly easily!

  6. Rystefn · February 10, 2012

    Yeah, I’ve seen hundreds, maybe thousands, of possums in my life, and that is very clearly a possum, sir. Honestly, I don’t see how anyone could think it was anything else unless they’d never seen one before, really.

    • WhySharksMatter · February 11, 2012

      You’ve seen thousands of possums? Where do you live, friend? I’ve only seen a few.

    • Southern Fried Scientist · February 11, 2012

      Didn’t you live in SC for, like, 3 years? And NC for 5 years before that? How have you not seen hundreds of possums?

Comments are closed.