Lobsters are always red (they are actually Red Lectroids From the Planet Ten), but you can’t see that because they have some sort of illusionary power that masks their true identity. However, when dipped in boiling hot water they can no longer concentrate enough to keep up their illusion (this also works with magicians, mimes, and politicians – well at least it’s worth a shot). Ok, perhaps that’s not the real reason. Maybe lobsters are red because they are freakin’ mad. You’d be mad too if someone tossed you into a tub of boiling water.