Evil Fish! Stopping Aggression In Your Aquarium! Fish Fighting!

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Check out our brand new website and shop for all of your aquarium supplies and fun merch!

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[Dormitator]

Problem: Evil fish
Solution: Get rid of evil fish
Result: Next biggest fish becomes evil fish
Solution: Get rid of evil fish
Result: Next biggest . . .

[ravermader]

I've had an African chiclid that lived to be 7-8 years old. He lived through my childhood, and his K/D ratio was like 5 to 1

[jamiemacdonald]

There is only one thing I’d add to this that has worked for me in the past. I had a problem fish and tried everything you suggested without success. I then had him in a timeout box, did a water change, redecorated the tank AND added 4 more fish. The fish I added had a size advantage so I really threw everything for a loop. Plus I did this at about 9pm and left the tank dark. The next day things settled in nicely for a while.

[JosephMartin]

One of my cichlids just knocked off the tank boss 😬😂 there has been a coup

[BenOchart]

Good points John. My “alpha” is a huge Venustus that, thank goodness, is usually mellow and even breaks up fights.
Fingers crossed.

[RiverLifeUS]

"This aggression will not stand." ~The Dude. The value of peace is worth the effort of eradicating aggression.

[natashasmiljanic]

This was so unbelievably helpful. Before today, I owned 6 male Guppies in a 30 litre tank and thought it would be a good idea to get some Amano Shrimp to help with the cleaning process. While we were at the store this morning, my dad saw some Endler Guppies that he really liked so we got 3 of them as they came in sets of 3 for a reduced price. As soon as I released the new tank mates, all of the fish and shrimp seemed to be quite interested and excited in one another (normal behaviour) so I fed them a pinch of food after an hour in hopes they would settle. Over the course of the next 3-4 hours, I watched the Endler Guppies slowly become more and more aggressive to the point where one of the Endler Guppies was biting on the gills of my regular Guppy. I started panicking and tried all of the methods you mentioned within your video after reading up on different forums. It's been about 3 hours and the Endler Guppies are still bullying my regular Guppies. I phoned the pet store and explained the situation and the store worker told me I would get a full refund if I brought them back in. I'm hoping they will calm down by tomorrow but if not then at least I know I can return them. Thankyou for your video and keep up the great work!

[jimmyguest]

I definitely have an evil fish and he is the biggest one as well. Done with it!

[wadem]

I've got a method what's worked for me for years. I use a bamboo stick to separate them and threaten them. Now I've only got to pick up the stick now and they know to chill. I think they just learnt through repetition. I believe it's the only reason a lot of my smaller fish are alive now. Smart fish you can train up.

[TamizhanSakthi]

Follow these steps:

1)Keep your tank over crowded...
2)Also add 2-3 Tin foil Barbs ( They are best distractors for aggressive fishes and also they will get easily escaped from attacks)....
3)When you see evil fish chasing.. Just distract the scenario by putting in 4-5 pellets...

[Calilasseia]

A technique that works with other territorial fish species, is this - break up lines of sight across and along the aquarium, so that the fish aren't constantly glowering at each other.
Once again, it's a matter of asking yourself what the fish wants, instead of you.
This technique works well with Central & South American Cichlids, because you can find pieces of relevant decor such as bogwood, that will act to break up the lines of sight in the aquarium, while imposing relatively few restrictions on movement.
Of course, this works best with big tanks, but with these fish, you should be aiming for the biggest tank you can anyway!
How to achieve the breaking up of lines of sight in a Rift Lake aquarium with rock decoration, I admit is going to be in the realm of "hard problems".Rocks aren't going to lend themselves well to this technique, unless you epoxy resin them together into intricate structures, which of course ruins your ability to rearrange them once they're set. But, it's worth trying if you have a fish you want to keep, but which goes into berserker mode the moment you put it in with other fish.
At the most extreme, you could try getting big rocks, and drilling S-bend caves in them, but if your fish pushes you into that corner, you might want to find a new home for it :)

[chrisvanheusen]

We definitely have an evil Cichlid, it has killed every single fish we ever had in the tank.
Through the course of about a week it killed all 15 fish....it even bangs into the glass from time to time.
I have never seen a fish act this way before in my 27 years of having a fish tank.
Now he is the only fish we have in our tank as we got tired of spending money on more fish.
We literary tried everything you suggested in your video....even the fish store wouldn't take it back!!
We named him Psycho, because that's exactly what he is.😁

[alwayswondering]

When I was a little guy, on Sundays after chuch my grandfather would take me to his mother's house. She had a small tropical comm-
unity of fish. A somewhat small show-tank over in the living room. She was a fiery Irish woman, so the 'chastisement' of her watery charges didn't surprise me much.
It was a bumblebee goby that upset her. The little guy was ornery, - bummblebee's
generally are. Anyway, she would use a pencil to 'spank' him. That's right, she would him chase round
the tank with the pencil and spank him.

[informer]

Time out method seemed to work for us. We had a very young good Severum who was being a jerk and picking on our other fish, even those that were twice as big as him. We put the gold Severum in a 10 gallon tank for a couple months and finally decided to try and put him back in our main tank (150 gallon). He is very well behaved now and gets along with everyone. I didn’t call it the time out method, I called it “doing time” lol. Watching your video though I think calling it a time out is better :)

[VIDEOHEREBOB]

Did you try having a little talk with them? "Listen up you little bastards. If you don't stop picking on the other guys, it's the clove oil for you. Do I make myself clear you slimy, ungrateful, waterlogged, tough guy, wannabes!" A little humor here....

[thisspaceforrent]

Fishkeeper: "If I can just figure out what he wants, I can solve the aggression problem."
Cichild: "Wanna know how I got these scars...?"
Some fish just want to watch the tank boil.

[slitsteve]

My Texas cichlid is soo aggressive and yet so calm, and he only shares his tank with a pleco who mainly stays inside decor because it constantly chases him

[HoneyMonsterNava]

For me the dominant fish in my african cichlid tank is a school of giant danios. They annoy everyone else to the point of not bothering to make a territory.

[morse]

Just had a cichlid freakout. 2 Severum and a JD who had been together for 6 months with no issues. All of a sudden last weekend, all out war in the tank. 2 dead from injuries sustained and one jumper. Tough week.

[Binkitastic]

I needed this video I sat up for hours last night contemplating what I'm gonna do, about my evil store is ooking like the best option