It's like all other pets in the game save for those the hunter tames, or the warlock aquires from quests, which means it doesn't attack anything. Just a little novelty pet.
On a sidenote, the Worg and Spider pets from the lbrs quests USED to see through stealth and attack things, but blizzard took their ability to fight away cause it kinda nulled stealth/prowl in PvP. The little oozling pets are the only non-combat pets that do anything now, and unfortunately, it gives you a debuff. Think it lowers your defense, or resistances, or both.