[The wince is as automatic as the expression of sympathy; despite the fact that there's no proof that all these hearts in jars are hurting them by merely... being there, it seems whatever's affecting Jetfire's making him a lot more... sensitive than usual.]

Ah... interesting. There aren't many things that can colour blood blue while still remaining effective for transporting oxygen while in a air-dominated environment, though I haven't had much chance to study organic species and their particulars.

[Since they'd mostly passed through planets that weren't under Decepticon attack.]