DavidW is coming off harsh, but he is correct.
Also, to be quite honest, they aren't very good pictures. If you learn to frame your pics properly, and use better equipment, perhaps one day you can get some money for them, but you aren't getting rich off fish pictures. Too many hobbyists are willing to give them away for free. I've donated some to cichlid forum and they have them up for Oreochromis Niloticus and a Gombi Julidichromis. Just enjoy having your name attached to a pic on the net, and look for other forms of income. That's what I do.