Tyrannical Kribs

Unfortunately, that sounds like breeding kribs. And also unfortunately, guppies make 'good' victims as they have large fins to attract attention and are slow swimming making them easy targets.

And if your kribs have bred once, they'll do it again.


The only solutions to your problem would appear to be to keep nothing but fast swimming fish with these kribs or to set up another tank just for the kribs. The problem with the latter one is that once the baby kribs reach a certain size, the parents will spawn again and see the first brood as a threat to the next; you'd need to remove the growing babies as soon as the parents showed signs of imminent spawning.


I'm sorry I can't be more help 

We've seen the fry this morning, tucked away in a tiny crevice so they do have a reason for being aggressive.
It was a bit shocking to witness to be honest.
We've decided to keep them and just keep a careful eye on them.