Bioaccumulate

Aquatic examples

Naturally produced toxins can also bioaccumulate. Coral reef fish can be responsible for the poisoning known as ciguatera when they accumulate a toxin called ciguatoxin from the phytoplankton they consume. In some eutrophic aquatic systems, biodilution can occur. This is a decrease in a contaminant with an increase in trophic level, due to higher concentrations of algae and bacteria diluting the concentration of the pollutant.