That was before I did much computer art. Now I know that silhouettes are probably the easiest images to make. Perhaps it's obvious - all it is, is a tracing of an outline of a shape from a photo, and then filling it in with a single color. On a computer, it's extremely easy, and can be done while listening to podcasts or mentally untangling the revelations from the most recent Lost episode.
Here I tried to show off the diversity of sharks, solely by their shape. They have elegant profiles, especially the thresher shark, with its elongate tail. It took a little while to balance the colors. And yes I made the most notorious shark pink on purpose.