This was a fun technical challenge, mostly just refamiliarizing myself with the particulars of reflection. Probably the hardest part was fine-tuning the water turbulence so that the eyes reflected clearly.
Then it was just a matter of doing two renders (one blue for the top and one red for the reflection) and compositing them together. I also did my standard postwork style, but I had to restore the original for the backdrop sky and its reflection in the water. Otherwise it lost too much detail.