To quantify the salinity preference of juvenile green sturgeon Acipenser medirostris , two groups of A. medirostris [140 days post hatch (dph); total length ( L T ) 38·0–52·5 cm] were acclimated to either near fresh water (mean ± s.e . salinity = 3·2 ± 0·6) or full‐strength salt water (34·1 ± 1·2) over 8 weeks. Following acclimation, the two groups were divided into experimental and control groups, where experimental A. mediro...