Daphnia pulex, the water flea, is a crustacian used to study water contamination. In 200 million bases it has 31,000 genes, apparently developed for protection against toxic chemicals in water. My guess is that this is the penultimate example of epigenetics in action. 50% more genes than we have! And many not like ours.- http://www.sciencedaily.com/releases/2011/02/110203141822.htm-http://www.physorg.com/ne...