I have a great deal of success sexing my Bolivian Rams by their size (my mature males are a bit larger) and the length of the caudal extensions. The extensions on my males are considerably longer. Michael -----Original Message----- From: owner-apisto@admin.listbox.com [mailto:owner-apisto@admin.listbox.com]On Behalf Of Rich Moore Sent: Wednesday, February 21, 2001 6:53 PM To: apisto@listbox.com Subject: Re: Bolivian Rams Hi Raymond I have found Bolivian Rams really hard to sex. Even Linke & Staeck admit that "their appearance....make determination of sex a matter of guessing..." However, I have sometimes had success identifying males by their dorsal fin, which tends to trail and become longer as they mature (a method suggested by L & S). Rich ------------------------------------------------------------------------- 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"! ------------------------------------------------------------------------- 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"!