My Golden Wonder Killifish Wont Stop Chasing My Corys

[micahweaver]

So I have a GW Killifish in my tank and he torments my Corys. He will hover above them and then dip down and nip their fins off. He never chases my Dwarf Gourami, Kuhli Loaches, Clown Pleco, Ramshorn snail, of Neon tetras. Just the catfish. Any suggestions?

 

[Frank the Fish guy]

This is not aggression, he is snacking on your corys. I had a GW Killi, and I ended up keeping him by himself in a 5 gallon tank. They try to eat what can fit in their mouth. Cory fins are tasty!

Try feeding him enough that he does not need any 'snacks'. That might work. What is his favorite food? Perhaps worms, or live fruit flies?

He is not really compatible with other fish. he is not a 'community' fish.

You also can't keep multiple GWs together. I have only had luck keeping them as singletons.

 

[fish 321]

How in the world has he not eaten the neon tetras yet!?

 

[micahweaver]

This is not aggression, he is snacking on your corys. I had a GW Killi, and I ended up keeping him by himself in a 5 gallon tank. They try to eat what can fit in their mouth. Cory fins are tasty!

Try feeding him enough that he does not need any 'snacks'. That might work. What is his favorite food? Perhaps worms, or live fruit flies?

He is not really compatible with other fish. he is not a 'community' fish.

You also can't keep multiple GWs together. I have only had luck keeping them as singletons.

Now that I think about it, he only attacks them in the evenings, which is when I feed them. I will feed him, freeze-dried bloodworms when I notice he attacks them.

 

[wishuponafish]

This is not aggression, he is snacking on your corys. I had a GW Killi, and I ended up keeping him by himself in a 5 gallon tank. They try to eat what can fit in their mouth. Cory fins are tasty!

Try feeding him enough that he does not need any 'snacks'. That might work. What is his favorite food? Perhaps worms, or live fruit flies?

He is not really compatible with other fish. he is not a 'community' fish.

You also can't keep multiple GWs together. I have only had luck keeping them as singletons.

I think the GWK just isn't compatible with OP's tank but I'll have to respectfully disagree with them being a species that has to be kept alone; I have 3 in a brackish community tank with puffers, mollies, gobies, etc. but have never seen any nipping or aggression from them or towards them and they spawn frequently.
As with any other fish, it's a matter of stocking compatibility and keeping them happy, and it can be pulled off.

 

[Frank the Fish guy]

I think the GWK just isn't compatible with OP's tank but I'll have to respectfully disagree with them being a species that has to be kept alone; I have 3 in a brackish community tank with puffers, mollies, gobies, etc. but have never seen any nipping or aggression from them or towards them and they spawn frequently.
As with any other fish, it's a matter of stocking compatibility and keeping them happy, and it can be pulled off.

Man I miss my GW Killi. He died a few years ago. I used to catch big bugs like flies and beetles and toss them in to float on the tank and he would swallow them whole. I have windows in the fish room that accumulate dead bugs on the window sills.

Good to know they can be kept in groups. More bug disposal!

Thanks for that insight wishuponafish!