A macro lens is a wonderful thing. As @sjarvie5 said yesterday (and I completely agree with her), with it we can look closer and see things that we would not see if we were looking at the whole scene. We begin to notice the details.
For example, we can look directly into the eyes of a small (several centimeters long) clownfish. We can even try to count its tiny teeth :) Yes, in this photo the focus is on the eyes, so the teeth are not so clearly visible, but we can focus on them if we want. In fact, I even have a second portrait photo of a fish where I did just that, but I'm not happy with how I was able to process it, so I chose this one for the post.
And the whole scene looks something like this. This is also nice and interesting, but still today I prefer the close-up view. Sometimes I regret that I use a macro lens too rarely :)
It's better to watch the photo in high resolution.
OLYMPUS E-M5 Mark II
Exposure time: 1/250 sec
Aperture: F 2.8
Sensitivity: ISO 200
Focal length: 60 mm
35 mm equivalent: 120 mm
You can also see my photos in my blog LJ and in my profile on NatGeo. You can read a short interview with me here.