It appears that your tank is under additional tank pictures instead of main tank picture. Additional tank pictures can't be rated i don't think. Delete it and reupload it as main tank picture.
As for finding your fish in the rate fish galleries i'm gonna go out on a limb and say its gonna be pretty hard as there are thousands of fish pictures that you will have to go through.
Usually it will take a pretty long time to accumulate votes on fish as I don't think many people rate on them as much as tanks.
I have had my fish pictures on here for a while now and only havel ike 10 votes compared to my tank picture which has over 100.
There aren't any new fish pic making it into the galleries... the webmaster decides which pics go in there, and as you can see from the existing pics, they have votes in the hundreds, which means they are pretty old pics.
Nice fish by the way... and welcome to the forums
I dont know if I posted my pictures correctly for rating