Fig 2. In-situ survey of fluorescence in mesophotic corals.

(a) Green fluorescence of Euphyllia paradivisia and (b) Orange-red fluorescence of Dipsastraea favus photographed under excitation by the blue-dominated natural light at depths of ~60 m. (c) Fluorescence imaging system photography showing the orange-red fluorescence emission of Echinophyllia aspera and the green fluorescence of Alveopora ocellata at ~53 m prior to collection for laboratory analyses.