Thanks everyone for your comments. I think I'm going to go with one of the red/green variants. @Kingsdaughter613 is right, in the ocean as you get further and further down reds and darker greens change to more neutral values, making them harder to see. That's why a lot of deep sea life is colored bright red. Here's a great video demonstrating the effect (Youtube Link). I do like the bluer colors, but I might save those for the (book 2 spoiler)
Now the chasms aren't underwater most of the time, but a similar coloration would be helpful in the darkness. Also @Fullborn you totally picked up on the glossiness problem. At the time I was tinkering with the shader and didn't have the glossiness how I liked it, so I ended up changing it to the more muted texture of the other renders. That's something I'm going to have right when I do my final renders with the updated texture.
Thanks for the feedback everyone, I'll post soon with an updated beast. :- )
-Critterweaver