Black Jacks -- Post em
- Thread starter Redchamp
- Start date
Black JD are just the natural color, i've seen dark and light ones in Petsmart before..
Heres a few picture of mine... One of them is darker than the other..
Heres a few picture of mine... One of them is darker than the other..
I have around two dozen adult Dempseys and hundreds of young ones
For many years Ive heard people say that Dempseys darken up when stressed and for years my experience has shown me Dempseys turn pale when stressed, dark when happy/confident
When keeping multiple Dempseys in the same large tank, I find the weaker ones to be pale and the most dominant to be dark.
But heres what youre looking for pictures!
Female Blue Dempsey in breeding dress
Young male Dempsey (dominant fish in a large lightly stocked tank)
For many years Ive heard people say that Dempseys darken up when stressed and for years my experience has shown me Dempseys turn pale when stressed, dark when happy/confident
When keeping multiple Dempseys in the same large tank, I find the weaker ones to be pale and the most dominant to be dark.
But heres what youre looking for pictures!
Female Blue Dempsey in breeding dress
Young male Dempsey (dominant fish in a large lightly stocked tank)
dark colored jacks could mean a number of reasons.
a. hes stressed
b. a reflection of his enivronment (dark background or gravel could make him look darker)
c. dominance trait
d. just a nautrally dark toned jd
My jack is on sand that is light as hell, thus making him look like he does. when i got him he was dark as hell but also on balck gravel. it all depends on his enivorment and his genes.
a. hes stressed
b. a reflection of his enivronment (dark background or gravel could make him look darker)
c. dominance trait
d. just a nautrally dark toned jd
My jack is on sand that is light as hell, thus making him look like he does. when i got him he was dark as hell but also on balck gravel. it all depends on his enivorment and his genes.
I have seen JDs get really dark and the same ones get really light, all depending on the environment and who is in there stressing them out.
nc_nutcase;2556502; said:I have around two dozen adult Dempseys and hundreds of young ones
For many years Ive heard people say that Dempseys darken up when stressed and for years my experience has shown me Dempseys turn pale when stressed, dark when happy/confident
When keeping multiple Dempseys in the same large tank, I find the weaker ones to be pale and the most dominant to be dark.
But heres what youre looking for pictures!
Female Blue Dempsey in breeding dress
Young male Dempsey (dominant fish in a large lightly stocked tank)
I agree with this post.
I agree with nc_nutcase. I've kept JDs for over 35 years, and when mine get stressed they go light not dark. If you look closely at the pic I posted, my dark JD is in the process of spawning with the Gold JD just below it. In my experience stressed fish don't tend to spawn readily. While I agree that dark substrate can cause a fish to darken, mine are on a white sand substrate, so the dark background theory doesn't seem to matter with some JDs. It seems that some individuals are just naturally darker than the norm. Hypermelanism is not unusual in many animals and fish.
Mark
Mark
