Missing tails

[MABJ]

Recently all my corys passed because my tetras or ghost shrimp or betta ate their tails off. I know it isnt fin rot, but is there any way I could find the culprit?

 

[Big-j]

I'd suspect the betta personally, I have a betta in my 10g with 5 corys but he's never bothered them, too lazy lol, yours might be younger and more aggressive towards other fish

 

[Viper]

My guess would be the tetras. I've never heard of ghost shrimp hurting anything and bettas I believe will generally only harass other fish if they too have long flowing fins. Of course I could be wrong, but I've heard of tetras being fin nippers.

 

[Big-j]

That's true, depending on the type of tetra, and they are faster and could actually catch the corys which I know my betta can't lol

 

[MABJ]

I think it's the tetras. I'm kinda pissed. I like the corys more than the tetras.