Are jbd super-aggressive?

  • We are currently upgrading MFK. thanks! -neo

Horiyoshi III

Jack Dempsey
MFK Member
Sep 29, 2006
2,125
2
36
45
41.769N -71.129W
www.facebook.com
My LFS has a SMOKIN' pair of juvies and i want 'em.My tankmates in my 90 are in my sig.Oh yeah,thats EBJD by the way,sorry for the typo:D

Thanks
 
No they are less agro than the regular jd's and not as hardy i hear they stress and die easly so i think your pike would kill him.
 
have them in a single tank with like tetras
 
GooDyboy420;625788; said:
have them in a single tank with like tetras

na i completely disagree......they would eat the tetras in a heartbeat.......mine is in my 75 gallon with an oscar, two polys, and a clown knife......he is probaly the most agro in the tank.........also in my experience they grow at a decent rate untill five inches and then slow down a whole lot(mine is a little over 7") ..........but i agree your pike would probaly be too aggresive for him........
 
I have attempted a BJD breeding project 2 years ago. Got a group of 6 juvies from Rapps himself! I slowly lost them all over a course of a year for no obvious reason what so ever. I then picked up another baby at LFS about a year ago. He did well with severums and geo juruparis but eventually died just like the previous batch -- no simptoms other than suddenly decreased appetite and just wasting away and not reacting to any treatment I have tried :(

In my experience they are VERY fragile, semi-aggressive to say the most, and often develop various deformities as a result of the "blue" gene. My last male who grew to only 4" in a year began developing "sunken eyes" as he got bigger. Its as if the space between his eyes (inside the head) never grew with the rest of the fish. While he got larger and fatter his eyes would sink more and more into the scull -- not a pretty sight :eek: I also think he was partially blind as a result :(

Not trying to talk you out of experimenting with blues. I just think you should know what you're up against BEFORE you get into it. I would not attempt keeping these with any Central Americans or anything that gets large like an oscar. Small and med-sized peaceful SAs are your best bet. In fact, I now think that a blue jack dempsey would make a nice addition to a uaru tank :)
 
Stab;626135; said:
I have attempted a BJD breeding project 2 years ago. Got a group of 6 juvies from Rapps himself! I slowly lost them all over a course of a year for no obvious reason what so ever. I then picked up another baby at LFS about a year ago. He did well with severums and geo juruparis but eventually died just like the previous batch -- no simptoms other than suddenly decreased appetite and just wasting away and not reacting to any treatment I have tried :(

In my experience they are VERY fragile, semi-aggressive to say the most, and often develop various deformities as a result of the "blue" gene. My last male who grew to only 4" in a year began developing "sunken eyes" as he got bigger. Its as if the space between his eyes (inside the head) never grew with the rest of the fish. While he got larger and fatter his eyes would sink more and more into the scull -- not a pretty sight :eek: I also think he was partially blind as a result :(

Not trying to talk you out of experimenting with blues. I just think you should know what you're up against BEFORE you get into it. I would not attempt keeping these with any Central Americans or anything that gets large like an oscar. Small and med-sized peaceful SAs are your best bet. In fact, I now think that a blue jack dempsey would make a nice addition to a uaru tank :)

Great Info... I've heard alot of horror stories about EBJD's being extremly fragile with deformities. I currently have a 2" specimen in a 29g growout with some congo tetras. I hope he turns out ok. Here is a pic.......

BD.JPG
 
Stab;626135; said:
I have attempted a BJD breeding project 2 years ago. Got a group of 6 juvies from Rapps himself! I slowly lost them all over a course of a year for no obvious reason what so ever. I then picked up another baby at LFS about a year ago. He did well with severums and geo juruparis but eventually died just like the previous batch -- no simptoms other than suddenly decreased appetite and just wasting away and not reacting to any treatment I have tried :(

In my experience they are VERY fragile, semi-aggressive to say the most, and often develop various deformities as a result of the "blue" gene. My last male who grew to only 4" in a year began developing "sunken eyes" as he got bigger. Its as if the space between his eyes (inside the head) never grew with the rest of the fish. While he got larger and fatter his eyes would sink more and more into the scull -- not a pretty sight :eek: I also think he was partially blind as a result :(

Not trying to talk you out of experimenting with blues. I just think you should know what you're up against BEFORE you get into it. I would not attempt keeping these with any Central Americans or anything that gets large like an oscar. Small and med-sized peaceful SAs are your best bet. In fact, I now think that a blue jack dempsey would make a nice addition to a uaru tank :)

That's some good to know info right there i did not know about the deformaties and sunken eyes i think that they are great looking fish but somebody will to stabilize those bad genes with a breeder project see if they can make a hardyer strain of the ebjd.:grinno:
 
The sunken eyes may be an exception rather than a norm. However, I have seen 2 unrelated sub-adults EBJDs developing this condition (one fish from my batch of breeders-to-be also had it). I have also seen a fish with a noticible overbite/jaw deformity. This probably results from the shortage of genetic material -- after all, all blue JDs currently in the hobby seem to originate from a single parent with a ressesive gene. Deepending on how rare this condition is, chances are there is nothing that selective breeding can ackoplish.
 
MonsterFishKeepers.com