As I understand it, they're a bit like Varren? Structurally, the two seem very similar, though I must say that Cosmo's breath was far less repellant. I imagine this largely stems from dietary reasons and -- and it was much nicer.
I don't suppose I could trouble you for an introduction could I? I don't mean to be rude it's just terribly disorienting and getting some sense of who I will be living alongside seems like the most reasonable course of action. Fortunately, this will not be my first time dealing with long term residency aboard a star-ship.
And that...is probably more than you need to know.