AbstractAfter 5–10 h exposure in static bio‐assays first‐summerSalmo salarlive in equilibrium with the ambient ethanol concentration of 117 mmol/1 at 10° and 16° C. At 4° C this equilibration is retarded and is not evident until after 24 h. A quantitative connection between ethanol oxidation (M) and body weight (W) in accordance with the general formula M = K × Wbseems to exist for young salmon at 16° C. From the present tests the numerical values of the constants K and b were estimated to be approximately 10.5 and ‐1.03 respectively. Changes in behaviour induced by ethanol and the influence of temperature upon the metabolism of ethanol are discu