High dose of DDT in aquatic bodies undergo biomagnification, and the ones which are highly affected are

Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. This phenomenon is well known for mercury and DDT. Biomagnification of DDT in an aquatic food chain is an example. The concentration of DDT is increased at successive trophic levels; 0.003 ppb (ppb = parts per billion) in water, it can ultimately reach 25 ppm (ppm = parts per million) in fish-eating birds, through biomagnification. So highest in birds.