I did a quick web search for Brotia. I did not find the species dactylus, though I found a lot of other species. I also found that no-one can seem to agree where to classify this genus. On various websites I found it listed under Thiaridae, Pleuroceridae, Melanellidae, and Melanatriidae (which I never heard of). Which is the correct family? I also discovered that there is a genus of tropical fish called Brotia. What's the story here? I thought that was a no-no. The fish can be seen here: http://members.tripodasia.com.sg/Shellsnut/loachinternal.htm Regards, Paul M.