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The relationship between the somatic growth rate (G) and feeding level (unfed, intermediate, and maximum rations) of age-0 juvenile cod Gadus morhua and haddock Melanogrammus aeglefinus was quantified at different temperatures. Laboratory trials were conducted using 2 size-classes of cod (3.6 to 5.6 cm standard length [SL], and 8.1 to 12.4 cm SL) at 5, 8, 12, and 15 C, and 1 size-class of haddock (6.0 to 9.6 cm SL) at 8 and 12 C. The shape of the growth-feeding relationship was well described by a 3-parameter asymptotic function for cod and by a linear function for haddock (R 2 range= 0.837 to 0.966). The growth rate and scope for growth were maximum at 12 C, whereas growth efficiency was greatest (26.0 to 32.2%) at temperatures between 5 and 8 C. Juvenile cod held at 15 C exhibited reduced rates and efficiencies of somatic growth compared to fish at other temperatures. Biochemical-based growth …