Swordtail Aggression

[Ianne]

He's trying to stab my other fish!

its quite cool actually he will chase one and when it stops he tries to rear up against it poking it with his tail

i moved the plants around since they got a tad bigger but will his aggression go away/cause a problem?

 

[jlink17]

What are the other occupants and how many of each and what size tank are they in?

 

[ctbestfisherman]

Male swordtails try to "trap" female swordtails with their tails in order to mate. This sometimes means they "stab" them. If the male swordtail doesn't have females he will try to do this to the other fish. It shouldn't hurt the fish either way.

 

[milesalive]

dont worry its completly natural

 

[SubRosa]

The sword is a soft-rayed fin. It isn't stiff enough to penetrate a wet kleenex. It's not a threat.