Well I'm certainly guilty of my own comments. I wouldn't mind having a better camera, myself. But I think when it comes to photographing aquatic life, it's all too easy to become seduced by the technical power of DSLR and expensive lenses. You know, the super macros that focus on the surface features of things our naked eye can't easily see. It's cool and I'm not disparaging such things. I'm knee deep in learning it too. But composition is also important. The relationship between a given thing and another within a finite space. That's what strikes me about a few of these photos. At times you see a perfect correlation with the golden ratio, in others he's totally "breaking the rules" with different dynamic angles. It's something to think about when taking photos of any subject matter IMO.
You can see the golden ratio in effect with this one picture in particular.