my one crowntail betta is huge he is way bigger than all my other bettas and at first i thought maybe CT bettas were just bigger than VT bettas but i have another CT that is smaller like my VT they eat the same food why do you think they are so different in size?

genetics. I'm sure he has different parents.

I beleive it's not uncommon to find the occasional larger than normal Betta now and again. Like Sushi says, it primarily depends on breeding and genetics, but also environmental factors such as water quality in early life. When you say huge, how much bigger is he than the others? Maybe post a picture

Yup there is such a thing as an occaisonal giant betta. Like Mrbumlbee mentioned a comparison pic would be helpfu. And as Sushi mentioned is probably just in his genes.

Just re-read my earlier post , what I meant to say was that poor water quality in early years can affect growth rates in all fish.

Overall growth is pre-determined to a certain extent by breeding and genetics

i am so sorry i didnt post sooner (i know this is kind if old) let me see if i can find the pic(i may have over exaggerated on huge he is just bigger than my other ones http://i82.photobucket.com/albums/j260/ash...01Image0087.jpg he is , more bigger in an up and down since than a long way but he is about a 1/2 inch bigger than my other bettas.

edit: the split was there when i bought him it is healing really well now

that's one big betta

wowo congrats he has nice coloring!

Looks lovely, it is a close up so it is hard to judge size, but he does look quite big. Lovely colours!

thanks