There are seven exotic pets in all, but only five of them are available to us now:
Rhino and the Spirit Beast will only be available in Northrend once the expansion actually arrives next month. For now, we have the selection of exotic beasts that would become available to a level 60 hunter upon first clicking that 51st talent point, and reaching the pinnacle of his or her mastery of beasts. These pets are not necessarily set in stone, of course, and they will change a bit over the next month or so, though how much is still anyone's guess.
So what makes each of these pets special? Let's have a look.