Updated Pics on EBJD and Red Terror / Need help sexing Red Terror

[Toby_H]

I am under the impression that the most reliable way to sex a Red Terror is to look for a spot on the dorsal fin which would indicate a female…

Since your fish doe not have a spot on the dorsal fin I would suggest it is a male… although it may be too young to have developed this spot… It also may be to young to rely on other sexing concepts…

How do you “know” your Blue Dempsey is a male? Most Blue Dempseys that survive to adulthood turn out to be males, and yours very well may be… but there is no way to sex them at smaller sizes…

Just so you know… if by some chance the Red Terror and the Blue Dempsey were to spawn… the offspring would not show the Blue color… The offspring would look exactly like a Standard JD/RT hybrid.

 

[VRWC]

I am under the impression that the most reliable way to sex a Red Terror is to look for a spot on the dorsal fin which would indicate a female…

I thought that too until I started seeing breeding pairs with black on both of the pairs dorsals.

I recall Balton had a male with black dorsal that he thought was female for the longest time, and after that convo, I recall seeing several others with pairs where the male had black on the dorsal...and this pair:

 

[AFelony]

I was able to sex the Dempsey i was told by the dorsal fin. The males have that long and pointy one where females are rounded. I posted a pics below not my fish but the one top is female and below you can see how the male has a longer and pointy fin. That is what i was told not sure how true?