excellent capture. 7 , back to review again , bumping up to 8. The colors and saturation are all excellent. Excellent planning. Probably the downside IMO is that the background is just a little messy for my preference. I would probably have selected the background and reduced highlights further and reduced saturation further to make the fish "pop" more. Just my suggestion
The initial rating of 6 on this image was mistaken. On first review, it appeared to be a riot of color without a lot of definition, but on review, the fish just jumps out of the background - it takes a while to see it which is a bit of a problem, but the detail is there - the problem lies in the overly color busy background. A little more bokeh would have helped the eye differentiate between the fish and background. A good entry into the challenge, it's been rerated an 8. Well done.
The best part of digital photography is the capturing of all the wonderful colours around us which is what you did in this beautiful picture. Good luck, I cross my fingers it'll ribbon.