The Dungeness crab begins its life as pelagic eggs and larvae, swept by the tides. Those that drift/swim into the San Francisco Bay then grow up to be big teenage crabs, which migrate back out to the ocean, find a sexy crab of the opposite sex, and start the life cycle over again. At least, that's what the biologists tell me.
The background of the SF bay was created using ODV. The crabs, arrows, et cetera were added in Illustrator. This is a vector image.
I made this in about an hour for a presentation I gave on 09 Oct 09 [link]
. I needed an illustration, and it was the morning of the presentation.
For those purposes, I was pretty happy with it.