User blog comment:BannedLagiacrus/Monster Hunter Ecological and Lore Info Blog/@comment-6050823-20160710030822

Why when I mentioned Khezu yesterday and today I found out more about its species...

Here we go boys and girls!
 * When hunting wasn't truly common in the world, Khezu was only considered a myth. The only thing known about it in those old times was its strange appearance.
 * Its "tail" isn't exactly a tail, it is actually a mouth... It seems, while the Khezu was a whelp, that "tail" was actually the mouth it used to feed on the blood of prey. As it continued growing, its real mouth further developed, allowing it to feed the way it does eventually.
 * This likely also applies to Gigginox.
 * Some grown teeth can be seen inside the "tail".
 * Khezu breeds by paralyzing prey, usually a medium-sized creature like a Popo, laying the eggs on the still alive victim, and leaving them to hatch on their first meal. When the whelps reach a certain size, they'll move to tight places like crevices, or even the shed skin of a Kushala Daora, and wait for another potential victim to latch onto.
 * Occasionally, hunters are attacked by them while mining.
 * The reason Khezu has so much fat inside its body to protect itself from its own shocks. If it didn't have this fat, it would kill itself with its own shock.