That is definitely not true.
My parents had found that out the hard way...
They had bought my little brother and sister two betta fish,
one boy, Shark, a pretty royal blue VT, and one girl, a plain brown VT, at the local petcetera, only because they were having a sale,
something like, 2 for $1.00 or something.
Anyway, when they got home, my parents didnt want to get another tank,
and they hadnt been told that the female, formerly known by my siblings as Lisa, was a female betta.
Anyway, they were put in the same fishbowl, with one plant in the center,
and things seemed to be going good, until one day, six months later,
Lisa got a hold of Sharks upper fin, and was sitting on the bottom of the tank, just starting to kill him.
Of course, when I walked in, I grabbed the fish net and held the female a couple inches to the surface so Shark could get up and go.
Ah, I hated Lisa after that.
I know it was only natural to her and Shark,
but I was eight.
Lisa wound up passing away first, due to old age,
and Shark then had the privilege of having a peaceful life for about half a year after.
I guess you could call them 'my fish', but they were housed into my brothers room, and other people seldom entered.
To put it simply, it didnt smell good.
My parents had absolutely no Idea about fish,
so this is why I have considered Pickle as my real first fish.
It was really crazy,
trust me, Shealynn, you dont want to get into that xD
(I dont know if anyones surprised or not, but they had never spawned.)
They were actually happy.
Shark was the prime example of health... Well, until... Yeah.