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The web page states the following, "Thanks to popular demand, here goes a little how to guide of how to capture underwater fluorescence How it works." I viewed that the web page also stated " First of all you will need specialised equipment in order to trigger the effect of and to observe underwater fluorescence." They also said " This you will need in any case, whether you want to just watch or capture the fluorescence on camera, because in the latter case you have to be able to find suitable subjects first. For underwater fluorescence photography you have the choice between using strong torches ." The meta header had fluorescence photography as the first search term. This keyword is followed by bio-fluorescence, underwater fluorescence, and black light dive torch which isn't as urgent as fluorescence photography. The other words they uses is blue light dive torch. uv dive light is included and might not be understood by search engines.