How can I tell if my Betta's a boy or girl?

[BettaFishLover]

When I bought my Betta, it was a spur of the moment thing. I didn't know anything about them. So now I can't tell what their sex is!!! Can anyone help me out? :(

[tmz]

the males are the ones with the long pretty fins and vibrant colors. the females are smaller with little fins


goole image male bettas and female bettas =)

[missfish1996]

male; big long fins for "showing off against opponents female; small for ummm swimming i guess.

[okiemavis]

There are short-finned male bettas as well. Finnage is really not the best way to tell a bettas gender.

Check this:
http://www.fishforum.com/viewtopic.php?t=17948

[3863]

Really?
I always thought fins were the way to go... Wow...
That link was VERY helpful! Thanks!