Ghostcrawler is one awesome looking pet. As you can see, he's a spectral crab. I see very few of these guys on my server, probably because no one ever quests in the new underwater zones. But if you are leveling a hunter, I would highly recommend going to Vashj'ir to level as your first leveling zone, and staying there until you get the sea horse mount. Then, go wherever you like.
For those un-familiar with the Ghostcrawler handle, Ghostcrawler the NPC is named after Greg “Ghostcrawler” Street, the lead systems designer for World of Warcraft. Very popular on Bliz's (and other) forums, this little crab spirit beast seems to have been aded primarily as a nod to him. But it's still a cool pet.
