Does zooplankton or small fish have the most DDT in its body?

Typically, zooplankton accumulate higher concentrations of DDT in their bodies compared to small fish. This is due to a process called biomagnification, where toxins like DDT become more concentrated at each level of the food chain. Zooplankton, being at the base, absorb DDT from the water and sediments, and when small fish consume them, the concentration of DDT increases in the fish. Thus, while both may contain DDT, small fish generally have higher levels due to their position in the food web.