gender dimophism

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Doesn't show up for me but how big is your bichir?
 
You might be able to tell the gender of your del. But probably not your sen. when you sex a bichir what your are looking for is a male really. Because when they are juveniles they all have the look of a female. When they get to 7-9 inches then you can properly tell the genders. The male will have a bulky anal fin the female will have a slimmer one. If you could post pics then it would help a lot.
 
This may not be true but i am 90% positive my 5 inch sen is a boy. His anal fin is fleshy,bulky, and has the darker outline. I can tell the anal fin difference because i have 2 other juveniles. It is the weirdest thing, because i got him when he was like 3 inches a year ago. so he can't be more than like 1.5 years old
 
Dr.B said:
This may not be true but i am 90% positive my 5 inch sen is a boy. His anal fin is fleshy,bulky, and has the darker outline. I can tell the anal fin difference because i have 2 other juveniles. It is the weirdest thing, because i got him when he was like 3 inches a year ago. so he can't be more than like 1.5 years old
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Only 5 inches and that old? Is he stunted or something? I have a few that are 4-5 months old and around 6-7 inches.
 
Idk i was wondering the same thing. He looks a little bigger maybe 6-7. But when i got him i had him in a 20 gallon for about 6 months (when i was inexpirienced, my LFS told me with lots of water changing he would be fine) But that was back then i have him in a lovely 75 gallon tank with 2 other buddies (ornate and buettikoferi) he is always the first one to the food (bloodworms, beef heart, brine shrimp)
 
Post a clear photo of the anal fin and if possible the stomach area of the fish, I can give you a pretty good idea of its sex.
 
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