The objective of the current studywas to establish the effects of temperatureand exercise on geosmin excretion by European eel (Anguilla anguilla).Wehypothesised that both exercise and temperature increase lead to faster geosmin excretion from fish in low geosmin water. The underlying mechanism for the effects of exercise and temperature increase may be related to the increase in oxygen demand they both cause, and their effectsmay therefore be cumulative