I also had someone look at these photos, this person is not only a very accomplished photographer, they also have been working in graphics for many years. Here's a portion of what they had to say.......
"You can actually see the color of the light bulbs in the one photo (red). You can also see the water is tinted as well. Water stays relatively neutral no matter what light since it's transparent (unless it's deep or dirty). The fact that the water is so tinted tells me that the color saturation has been turned up quite a bit in software, either post processing or camera.
My thinking is that these fish are more orange than red when exposed to natural daylight. The second photo looks more natural, just a bit over saturated. The first photo is probably the worst one, with almost all the yellow washed out, but you can see on the tail of a third fish in the background, that is not directly under the light, that it's more yellow.
If I had a reference point, such as a white item in the tank, then I would be able to adjust the colors pretty close to what it should be.
Most people don't have the knowledge how to set the correct white balance and not even the best cameras can figure it out with the type of bulbs we use in our tanks today. The person who took these photos probably used auto white balance and then added a lot of saturation in post processing."