Extended Data Fig. 3: Irradiance differences between 4 m and 10 m water depth.

(a,b) Daylight spectra without twilight of 4 m (a) and 10 m (b) water depth during June 2011. For 3D-rotational graph: Supplementary data 4 and 5. (c,d) Monthly average 2D plot of (a,b) in logarithmic (c) and in linear scale (d). Blue: 4 m, Red: 10 m. (e) Wavelength ratios between monthly average of June 2011-4 m/June 2011-10 m. (f,g) Zoom-in for specific wavelengths ranges from plot (d) for better visualization. Black dotted lines: range of strong c-opsin1 activation. Data were corrected for daylight saving time shifts.