On Seals, the Dogs of the Sea

The other day, a group of archaeologists (myself included) stood around trays of assorted animal bones from a recent surface collection. It was just a cursory glance at the assemblage, but of course the mind immediately starts identifying bones that jump out at you.

“That’s a dog mandible…that’s a cow tooth…that’s bird, for sure…and that’s…a dog too?”

It was a fragment of a mandible that certainly looked like a dog at first glance…and yet, there was something a bit off. After looking at it for some time, it finally hit me: oh, it’s a seal. The dogs of the sea.

Seal and Canine Mandibles

When you start off in zooarchaeology, you start to find big indicators that immediately help you narrow down an identification – little “shortcuts”, if you will. Case in point – identifying seals based on comparing them to dogs.

Above, you’ll see a dog mandible and a sea mandible. Side by side, it’s a bit easier to see the difference between the two. But on its own, it’s not that difficult to mistake a seal mandible for that of a dog. I chalk it up to the teeth shape being very similar, and some slight similarities in the shape of the mandible itself (note – the mandible that was originally in question was smaller than the above mandible, so a bit easier to mistake for a dog!).

So with that in mind, it’s a bit handy to keep that in your mental toolkit. Got a mandible that looks like a dog’s, but something’s a bit…off? Might be a seal!

Seal Skull

Of course, there’s plenty of variation in dog skulls among different breeds that maybe that’s not the best conclusion to jump to, so here’s another tip: check the sort of overall bone there is. Does it look rather porous? Well, that’s an easy sign that you’re dealing with some sort of marine animal! So if you have a mandible that looks dog-like, but has a porous quality to it? Either it’s a mythical sea dog (in that case please send me photos)…or most likely, some kind of seal.

UPDATE: After further conversation with another zooarchaeologist, it turns out that dog mandible might actually be a wolf mandible! Oops…well, point still stands, I guess!

Seal pelvis

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