Hello Vern Look for vertical stripes in the caudal anal and dorsal fins, if the fish has it, its a male, if not its a female! Sort of same what you sex Nanochromis Transvestitus. I had a pair once several years ago and wasnt very successful with them. I do remember them being very very aggressive, so i would give them a large tank with lots and lots of hiding spaces. I think i tried to keep them in too small a tank. I was trying a 20 long and my female got beat on badly very often. I hope you have more success then i did, they are really a very beautiful fish. Some day i'm gonna try them again. John ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!