How come...!!?

Question

...a female Xiphophorus helleri is agressive?

The story goes like this:
My Xiphophorus helleri always defends her territory. She attacks my larger male Carassius auratus(maybe 2 inches?) and my male Brachydanio reiro(1.2 inches). Everytime the two come close to her territory, she chases them. This happens especially during feeding time. She's not the kind of fish that likes to get all the food. She still shares.

She is a FEMALE XIPHOPHORUS HELLERI.
She is about 1 inch. Her territory is my mini-jungle. A lot of plants indeed in that area.

So, do these cases happen? I read the they should be less agressive. Please explain thoroughly why they do this attitude.

PLEASE NO STUPID ANSWERS.

Chad M.D.

NO SHE'S NOT PREGNANT.

Answer 1

Some fish are just like that... While the majority of Xiphophorus helleri are quite peaceful, and usually the ones to be attacked, there will always be the oddball that defends "their territory", whatever they decide it is... Until you see any real damage being done, just let it go...

Soop Nazi

Answer 2

there not agressive but territorial if that makes any sence to its meaning. ok like if she had a mate she would calm down but they might tag team on intruders you have to look at our tank like a grid with 100 blocks.. they own 23 lets say and the Brachydanio reiro has the middle half 30 squares and the others have there own its all balanced out you see but if your tank is to small the squares might intervien and thats why she becomes more abnormally territorial

Answer 3

she's probably just territorial or pregnant. have you noticed a large stomach?? because my friend had a pregnant fish and it tends to be aggresive and twitchy.

Answer 4

some fish just can be more aggressive than others. it happens in nature. all of my sword fish i have ever had were aggressive.
P.S. Please use common names of the fish! like zebra dannyo and sword fish!