The Spirit of Ha-Khalan was tameable, so some Hunters got really cool, transluscent crocolisk pets. I mean, who needs Spirit Beasts? Entertainingly enough, the other two quest mobs were also classified as beasts and were likewise tameable. Eventually some Hunters were running around with a spooky hydra or, like my friend, a disgusting little pile of snot.
Aside from waiting for the right daily quest, these pets aren't nearly as hard to tame as the ghost wolves of yore. Will Blizzard let Hunters keep their slimy little companions just as some lucky few were able to keep their spirit guides? We'll see. Hopefully. What's so wrong about a slime that thinks it's a crocolisk, anyway? The pets are considered Crocolisks and share Crocolisk family traits, with the Bad Attitude special ability and Tenacity talent tree.