Murner New Year's Eve Pikes (view on YouTube)
This video shows that next to suitable and willing actors you cannot get away with the following two important indegrients for getting good shots: light and sight.
So when it comes to light: the money I spent on my two video lights Sola 2000F from Light & Motion was spent very well. Appearently these lights are quite an improvement for scene lighting. Even with the overcast sky the pike in their environment show fine colors. You know what? I rarely had so far so much fun grading the underwater raw footage ... because I mainly just had to adjust the contrast, while colors were already almost fine, apart from really small adjustments.