Illustrations of P'an-Ku represent him in the company of supernatural animals that symbolize old age or immortality, viz., the tortoise and the crane; sometimes also the dragon, the emblem of power, and the phoenix, the emblem of bliss.
This is significant because Pangu is said to have been helped by the beasts when he was separating heaven from earth. This shows that Pangu didn't created the world alone. He had help from these 5 beasts.