WHat is the THEME of this POEM???HELP?

PLEASe can you please help me finding the THEME of this poem:





The Shark





He seemed to know the harbour,


So leisurely he swam;


His fin,


Like a piece of sheet-iron,


Three-cornered,


And with knife-edge,


Stirred not a bubble


As it moved


With its base-line on the water.





His body was tubular


And tapered


And smoke-blue,


And as he passed the wharf


He turned,


And snapped at a flat-fish


That was dead and floating.


And I saw the flash of a white throat,


And a double row of white teeth,


And eyes of metallic grey,


Hard and narrow and slit.





Then out of the harbour,


With that three-cornered fin


Shearing without a bubble the water


Lithely,


Leisurely,


He swam --


That strange fish,


Tubular, tapered, smoke-blue,


Part vulture, part wolf,


Part neither -- for his blood was cold.

WHat is the THEME of this POEM???HELP?
the topic of the poem is a shark, the theme could be 'life', as in the life of the shark
Reply:um, i might be being really thick here, but isn't the theme a shark?



auto financing