Hi Jan,
Here, for example, is just one set of images by fish photographer, Ron Morse. You'll find more by searching under, "Fish Photo" or Ron Morse.
Here's another one by Brandon Jones. Each of these threads deserve attention. By commenting there and even sending them a PM to let them know, you establish an interest in your own work. As Cem so rightly pointed out, people will respond to your work but like to be acknowledged.
I hope you will look at these other photographer's pictures.
The idea is to post, comment in a truthful and useful manner to other pictures and always let people know you have read their comments.
Use up to 4 related pictures in the same post and give some context if you want comments on the quality of the work. If it's just the experience we get, then that's a controversial subject. I respond better to a picture after an introduction. Others insist that the photo must speak for itself. Personally I feel that giving an introduction will get more comment and more sales.
Asher