Chapter 1, Part 1 - Chuang Tzu

In the Northern Ocean there is a fish, the name of which is Khwan,-- I do not know how many lî in size. It changes into a bird with the name of Phang, the back of which is (also)-- I do not know how many lî in extent. When this bird rouses itself and flies, its wings are like clouds all round the sky. When the sea is moved (so as to bear it along), it prepares to remove to the Southern Ocean. The Southern Ocean is the Pool of Heaven.

There is the (book called) Khî Hsieh,-- a record of marvels. We have in it these words:-- 'When the phang is removing to the Southern Ocean it flaps (its wings) on the water for 3000 lî. Then it ascends on a whirlwind 90,000 lî, and it rests only at the end of six months.' (But similar to this is the movement of the breezes which we call) the horses of the fields, of the dust (which quivers in the sunbeams), and of living things as they are blown against one another by the air. Is its azure the proper colour of the sky? Or is it occasioned by its distance and illimitable extent? If one were looking down (from above), the very same appearance would just meet his view.
~ James Legge translation via Stephen R. McIntyre ~

Go here to read the introductory post to the chapters of the Book of Chuang Tzu.