Awesome find! And yay, more water pets
Edit: From the screenshot, looks like the vendor is part of the Jinyu
faction (alliance) or at least of the fish-people race that make up the Jinyu faction. (The horde equivalent would be the Hozen
.) If this is correct, then I'm going to venture out on a limb and guess that there's another pet vendor somewhere in Pandaria (for horde). Or this vendor could be neutral too.