Quotes: Your Brain Won't Be Much of a Meal

Grim: I think it's trying to suck his brains out, mon
Mandy: Poor thing's gonna starve.

"Species XR17 feeds upon the mental energies of its victims. This explains why the goblins remain unaffected." —Riptide Project researcher
— Flavor text from Magic: The Gathering card "Synapse Sliver".

Lister: The point is, they use this power of Illusion to lure you onto the asteroids and then they strip the ship of whatever they can use and then suck our your brains.
Rimmer: Well they shouldn't bother us then, there's barely an snack onboard.