Additional File 2
Red fluorescent fish. MPG video clip showing fluorescent fish under "normal" viewing conditions  versus  conditions emphasizing red fluorescence.  Sequence 1a:  Redeye goby (Bryaninops natans) (field at ca. 17 m depth, using, natural daytime illumination, no filter).  Sequence 1b:  Several groups of  Bryaninops natans  showing red fluorescence (in the field at 25–18 m depth, using Canon PowerShot G7 and Sony HD HDR-CX6EK under natural daytime illumination through red filter, post-processed to highlight reds).  Sequence 1c:  Bryaninops natans  individual under changing viewing conditions (laboratory with blue illumination, moving red filter, using Canon PowerShot G7).  Sequence 2a:  Pseudocheilinus evanidus  in its natural environment (field at 25 m, using Canon PowerShot G7, natural daytime illumination, no filter).  Sequence 2b:  Pseudocheilinus evanidus  showing red fluorescence (field at 25 m, using Canon PowerShot G7 and Sony HD HDR-CX6EK, natural daytime illumination, red filter, post-processed to highlight reds).  Sequence 3a:  Ctenogobiops maculosus  at the entrance of its burrow (field at 17 m, using Sony HD HDR-CX6EK, natural daytime illumination, no filter).  Sequence 3b:  Ctenogobiops maculosus  showing red fluorescent eyes (field at 17 m, natural daytime illumination, red filter, post-processed to highlight reds).  Sequence 4a:  Ctenogobiops tangaroai  under broad spectrum light (laboratory, using Sony HD HDR-CX6EK, white light form halogen source, no filter).  Sequence 4b:  Ctenogobiops tangaroai  highlighting red fluorescence under blue light (laboratory, using Sony HD HDR-CX6EK, white light form halogen source filter through scuba-blue filter, recording through red filter, not post-processed).  Sequence 5:  Eviota pellucida  ( C. tangaroai  in background) highlighting red fluorescence under blue light (laboratory, white light form halogen source filter through scuba-blue filter, recording through red filter, not post-processed).  Sequence 6a:  Enneapterygius abeli  showing crypsis in large part of spectrum (laboratory, using Canon PowerShot G7, cold light source, no filter).  Sequence 6b:  Enneapterygius abeli  showing red fluorescence (laboratory, using Canon PowerShot G7, blue light source, red filter, no post-processing).  Sequence 7a:  Corythoichthys schultzi  showing cryptic colouration (field at ca. 20 m depth, using Sony HD HDR-CX6EK, natural daytime illumination, no filter).  Sequence 7b:  Corythoichthys schultzi  showing red fluorescence (field at ca. 20 m depth,, natural daytime illumination, red filter, post-processed to emphasize red fluorescence).
Michiels N, Anthes N, Hart N, Herler J, Meixner A, Schleifenbaum F, Schulte G, Siebeck U, Sprenger D, Wucherer M
CC BY 2.0
<cite style="font-style:normal">Michiels N, Anthes N, Hart N, Herler J, Meixner A, Schleifenbaum F, Schulte G, Siebeck U, Sprenger D, Wucherer M. "<a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2567963">Red fluorescence in reef fish: A novel signalling mechanism?</a>". <i>BMC Ecology</i>. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1186/1472-6785-8-16">10.1186/1472-6785-8-16</a>. <a href="https://en.wikipedia.org/wiki/PMID" class="extiw" title="w:PMID">PMID</a> <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pubmed/18796150">18796150</a>. <a href="https://en.wikipedia.org/wiki/PubMed_Central" class="extiw" title="w:PubMed Central">PMC</a>: <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2567963">2567963</a>.</cite>