Cadmium induced phenotype. Representative micrographs of 21-d Daphnia pulex maintained under A) control conditions or B) exposed to cadmium (2.5 μg Cd/L). Images were collected at the same scale and are presented as raw image files. Differences were observed in a) body length and b) number of eggs in the brood chamber. The control animal also has a larger c) ovary and more pronounced lipid stores (represented by arrows).