The first three pictures are of the same loach who featured in my 'little brown fish' post a few weeks ago.
Full size crop of his fin:
Grazing on the mopani.
It is not an easy lens to use as shown by this picture, the depth of field at macro levels is tiny, there is only a small band of about 4mm actually in focus here, still this female has lovely markings
Finally a few non-loach subjects, a red bee shrimp:
Rasbora pauciperforata, the detail on the scales is something to behold.
These scaled down copies really don't do this lens justice, please click on the pictures and look for the "Download Photo" link to get full size versions of any you like.