How to Sex Your Fish
By Evelyn
Copyright 2007

Goldfish are almost impossible to sex, but here is a link on how to do it
http://www.bristol-aquarists.org.uk/goldfish/info/sexing-fs.htm

The Anatomy of fish, explained on a guppy

Female Guppy
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/guppy1.jpg
(1) mouth
(2) nostril
(3) eye
(4) operculum covering gills
(5) pectoral fin
(6) pelvic fin
(7) dorsal fin
(8 ) caudal fin or tail

Male Guppy
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/male1.jpg



Other fish

Male Molly
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/black_molly.jpg

Female molly
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/black-molly.jpg



Male platy
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/male2.jpg

Female platy
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/female.jpg



Male betta
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/betta03.jpg

female betta
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/betta05G.jpg

conditioned female betta with visible white egg spot
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/ovipositor2.jpg



neon tetras
female on the top/male on the bottom, notice the female is plumber then the male
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/axel.jpg



zebra danios
male on the top/female on the bottom, notice the same thing, the female is plumber then the male
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/Copy20of20sbs_zebra.jpg



swordtails
male on the top/female on the bottom, notice the male has a sword tail but the female doesn't
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/3158_web.jpg



Nannostomus also called "Peru Red" or simply "Red"
the female on top/males are colored blood red from the middle of their body up to the caudal, the one on the bottom
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/mortenthaleri_zahradka2.jpg



Senegal Bichir
notice the difference in their anal fins
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/bichirs2ms6.jpg
http://www.photobucket.com/albums/bb53/evelynmarch26/sexing%20fish/bichirssy3.jpg


I hope that helps many fish keepers to sex their fish, it's not that hard at all when you know what you're looking for.