'Killer Fish' Question

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I had 180g tank when I first started keeping fish.

I had a red devil, buttikoferi, dovii, jaguar, festae, and trimac in the 180g. They all were about 1.5 inches when I got them. After 8 months of keeping them, the buttikoferi went rampage destroyed/killed the trimac and festae. Then the jaguar got killed by the dovii. Then the red devil got killed from the buttikoferi. I was an idiot when I started, but you eventually learn lol. All the deaths happened in the morning(which they got killed the night before). They usually let you know though, they'll start chasing relentlessly and flaring at you.

Surprisingly from all the stories I've heard about dovii's mine got massacred by the buttikoferi, even though the dovii was bigger by 4 inches. The butti was the last one. I got rid of him before he got rid of me. I swear he was going to break the glass from attacking me.
 
I agree w/ a lot in this thread, but Yawning is stretching the jaw mussels and not a sign of aggression. Yawning is a sign of aggression w/ mamals like chimps and lions. Fish are different though. They use body posture and gill flaring.
Some signs of aggression and potential killing would be a lot of gill flaring and "s" shape body posture. Once you see a lot of this keep a good eye on that behavior.
It seems some cichlids like amphs can go psycho over night w/ out warning.
I haven't lost a cichlid due to aggression in a long time, but I had to remove my male h. Deppi from my 150g about 5 months ago because he almost killed a larger female robertsoni and a smaller male salvini over night. The two were beaten pretty badly, but they recovered. I keep the deppi by himself now.


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I have noticed with a lot of the fish I have kept is that when they don't like tank mates they form a "s" with the body and gill flares like crazy then they start chasing. When that happens I have taken the fish out and moved to another tank or brought it back to the store. It happens in all tanks at one point or another. I also had a venny pike that was 10" go nuts and kill 3 fish with no signs what do ever so there isn't always a sign tho either


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Very interesting info. Never knew about the 'S' shaped body posture, either. The little Midas is starting to chase my paratheraps a bit, but never does damage. I watch the tank very closely and right now that is the only aggression I've witnessed. The Midas is growing fast, though. The Carpintis seems to be more territorial where the Midas seems to only care about eating at this stage. The Carpintis is growing extremely slowly which is a good thing. He/She absolutely hates my Salvini for some reason. I've taken the that fish out a couple times for time out, and that seems to help. I'll most likely take the Carpintis out perm very shortly.

Kaliedoscope: I've def noticed that fish that are much smaller or larger, not same shape, catfish, etc. are generally ignored by other Cichlids. I've purposely overstocked the 150G with fish in order to keep the aggressive ones busy with more fish. Seems to be working for now, although some of the fish just have a general dislike for certain fish. The Midas and Melanurus, and the Carpintis and Salvini for instance. The Sev, Krib, and plecos can pretty much do what they want in the tank without anyone bothering them. In fact, the Krib is the most aggressive of all the fish. They all 'brush him off'. ;)

Here's a video of the tank taken a month ago. The Midas is getting much more 'deep bodied' now and I'm watching very closely. I'll most likely move that fish out soon to be safe. He's at that 5 inch mark and I notice a little more attitude the past few days -which is why I posted this thread.


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Today. Melanurus pushes back and Sev plays peacemaker. (Prepping water change - dirty glass):

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I read that is how they contract their stomach keeping food down, making room for more food so they grow. I just searched it lol

I agree w/ a lot in this thread, but Yawning is stretching the jaw mussels and not a sign of aggression.
I apologize- "it's like a silent roar" etc. was joking.
in the future I'll specify that, instead of just 'LOL'. (killing spree descriptions had me laughing @ cichlids in general)
;-)
 
I read that is how they contract their stomach keeping food down, making room for more food so they grow. I just searched it lol


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Well you learn something new everyday! I always thought the "yawn" was saying "LOOK HOW BIG MY MOUTH IS, DONT MESS WITH ME!" Thanks for the correction:thumbup:

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