It's that moment when you realize you didn't have to use a diffuser to take these photos. I have been taking advantage of the acrylic surface and the six-sided nature of the aquarium. The light bounces off this material differently than on glass tanks. The flash usually reflects on the front of the surface. That's why I have to aim it on the trim or some other object directly in line of sight. In these, digital zoom, as shown in the upper right, and the two lower ones, keeps the flash point out of range. I always rhought it was the water surface that was absorbing the reflected light. Now I see that the back of the aquarium has a lot of bounce back too.
