Artists work in all kinds of mediums.  Christo and Jeanne-Claude wraps buildings, coastlines, and entire islands with nylon fabric.  Others crochet coral reefs.  Ptolemy Elrington uses reclaimed hubcaps.  Yes, hubcaps.  And he creates some awesome marine art out them too.  Viper fish, hammerhead sharks, insects, octopi, animals…you name it:

An octopus:

http://www.flickr.com/photos/embra/13167384/

A lampfish:

http://www.flickr.com/photos/embra/13166685/

A “VW” Fish:

http://www.flickr.com/photos/embra/13166687/in/photostream/

Check out his website for more examples of his art.

(via Make:Blog)