"Uh..." Palmer would say that the creature in the image doesn't look dangerous, but he knows from experience that something doesn't have to look dangerous to be. "I'm guessing there's worse out there. A lot worse. At least the Fallen were willing to draw a ceasefire, eventually."

The way the Doctor's talking about them, he can guess they're creatures to be feared.

"If I can ask, what is this species? The way you talk about them...they sound extremely dangerous."