Female betta fins nipped

[Zoeeannee]

What is nipping my female bettas fins?

My betta lives in a planted tank with no sharp objects that she could cut her fins on. She is in a community tanks with:
- 2x female 1x male gardners killifish
- cardinal tetras
- glowlight tetras
- 1x small shy bristlenose pleco
- sterbai corydoras
- pygmy corydoras

She has been in this tank with these species for about 4-6 months now with no problems until I noticed today.

I don’t think it’s fin rot but have treated just in case.

Any ideas?

 

[mbsqw1d]

What is nipping my female bettas fins?

My betta lives in a planted tank with no sharp objects that she could cut her fins on. She is in a community tanks with:
- 2x female 1x male gardners killifish
- cardinal tetras
- glowlight tetras
- 1x small shy bristlenose pleco
- sterbai corydoras
- pygmy corydoras

She has been in this tank with these species for about 4-6 months now with no problems until I noticed today.

I don’t think it’s fin rot but have treated just in case.

Any ideas?

Cardinal are my guess.

Betta really should live alone to be honest (size of tank depending).

 

[Byron]

You don't say how many of each species of tetra you have (this affects aggressive behaviours, hence the question), so either tetra may be involved. The killifish is not exempt either. You can certainly rule out the cories, and bristlenose.

 

[Lajos_Detari]

Actually all Tetras and Killifish will be tempted to nip the fins of other fish if they have the opportunity.
Bettas will also fight among themselves and nip each other fins and tail.

My Killifish even tried to nip the fins of my Red Phantom Tetras.

 

[Colin_T]

Pictures of the fish and tank?

If it is biting, either the tetras or killifish.