Considering that Selkies are not known for willingly taking human husbands, while there are exceptions, it makes me question Sparkplug's morality.

And so would the autobots, once they research Selkie myths.

I can see Spike learning of his heritage when the Decepticons decide to play drown-the-human.

*Grins* And freaking out both sides while doing so.

Random Autobot: "So does this mean that his alt-mode's a seal?"

*snicker* If this gets written, that line totally needs to be included.

Can humans join too, I wonder?

Considering the discovery channel, I think we're the co-founders.