Predators vs Dithers/Target Fish: What to look out for? When to divide / separate?

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philipraposo1982

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Feb 21, 2016
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Hi again mfk,

I got some red hook SD's and they been in QT for a while. Today was the day I decided to add them to my grow out tank with my festae. The SD's are all around 3-4" and my festae is about 5.5".

I did a big water change and move around some decor prior to adding them, made sure to feed her good prior as well. This is the first time I have attempted to add fish like this. She has been solo in the tank since 1.5" and I was worried about how this was going to go down.

So i turn to mfk. What kind of behavior to you folks keep an eye out for when attempting something like this? Obviously if she goes right after them and trying to kill them its pretty obvious what the outcome would eventually be. But this is not the case for me right now.

She definitely has her guard up, she is controlling most of the tank and keeping them to the upper part of the water column. She moves them out of her way.

The SD's have taken no damage so far, they do what they can to stay out of her way, they are actively swimming around the tank but haven't had the chance to explore the lower parts yet and she doesn't let them down there just yet. Its been at least 5 hours since the been in the tank with her and did eat dinner in there too.

My gut is telling me this sort of behavior she is showing is that of dominance and to establish who is boss but clearly not trying to kill them or eat them. at least not yet.

I'm sure many of you here have been in a similar situation and was wondering what advice could be given. I am prepared to separate if necessary. I don't want to pull the trigger to quick and not give it a chance either though.

Any advice on this would be awesome.

Thanks
 
Hi again mfk,

I got some red hook SD's and they been in QT for a while. Today was the day I decided to add them to my grow out tank with my festae. The SD's are all around 3-4" and my festae is about 5.5".

I did a big water change and move around some decor prior to adding them, made sure to feed her good prior as well. This is the first time I have attempted to add fish like this. She has been solo in the tank since 1.5" and I was worried about how this was going to go down.

So i turn to mfk. What kind of behavior to you folks keep an eye out for when attempting something like this? Obviously if she goes right after them and trying to kill them its pretty obvious what the outcome would eventually be. But this is not the case for me right now.

She definitely has her guard up, she is controlling most of the tank and keeping them to the upper part of the water column. She moves them out of her way.

The SD's have taken no damage so far, they do what they can to stay out of her way, they are actively swimming around the tank but haven't had the chance to explore the lower parts yet and she doesn't let them down there just yet. Its been at least 5 hours since the been in the tank with her and did eat dinner in there too.

My gut is telling me this sort of behavior she is showing is that of dominance and to establish who is boss but clearly not trying to kill them or eat them. at least not yet.

I'm sure many of you here have been in a similar situation and was wondering what advice could be given. I am prepared to separate if necessary. I don't want to pull the trigger to quick and not give it a chance either though.

Any advice on this would be awesome.

Thanks



Ive learned that dithers don't mean fish added so a dominant aggressive fish can beat up on them. I know you get that but some don't. I had a situation yesterday while feeding my fish in the 180 gallon noticed my largest Silver Dollar was scraped up. Went back down to turn a light off and caught the Dragon Blood biting the large SD got pissed and he will be gone.
 
Yeah I totally am not adding them to the tank to be harmed or live in fear. My goal is to just bring my female festae out some more and add more interest to the tank without causing any issues with fighting.

I really like the red hooks and by the looks of things right now, my festae seems to be good with them too.
 
Yeah I totally am not adding them to the tank to be harmed or live in fear. My goal is to just bring my female festae out some more and add more interest to the tank without causing any issues with fighting.

I really like the red hooks and by the looks of things right now, my festae seems to be good with them too.



That's good to hear.
 
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Providing your growout tank has enough space, chances are the Festae will establish dominance over the Red Hooks in a non lethal manner. As long as the RH's are too big to eat, and the Festae doesn't sense a threat, things will probably work out. Heres an old pic of one of my tanks w/ Festae, Rivulatus and a school of Spotted Silver Dollars. Things went well for quite a while before I changed it up.20190126_204947.jpg
 
When I added SD's in with Toni she took a test/taste bite of the smallest. Realised that she can't eat them so pretty much left them alone after that. An ocasional chase when one ran off with her food.
 
Can SD's be aggressive with each other? I have one which is a little bit larger then the others and at night he/she will give chase to some others in the group. Normal type behavior or something to worry about?

Yes that's normal. They have a pecking order in the group. The two biggest will slapbox each other from time to time.
 
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