Average temperature (°C, A-C), salinity (D-F), and ocean current fields (m s−1, G-I) at median nighttime migration depths of eels experienced during their migration (± robust standard deviation, Hyslop and White 2009); left: Eel 1, Anguilla marmorata, 174 ± 30 m; middle: Eel 2, Anguilla marmorata, 188 ± 45 m; right: Eel 3, Anguilla megastoma, 177 ± 21 m). Red and blue (or white) star represents release and pop-up location, respectively.