They could be suits with methane. Those little guys you saw back there breathed it.

[An evolutionary advantage in their world, but not when what you breathe is something that can blow up. Such as these penguins.

...

She stares at the angry penguins, and realizes that one of her missions in this place has just been buggered to hell.]

Can I ask a favor, sir? Don't tell Charlotte what I did.

[She is not going to be happy.]

Get them, doods!

[With many doods, they charge against the pair, with daggers, bats with spikes, frying pans, and fish.]