[waecky]

hi everyone.i really love fishes.but i dont know how to differentiate the male and the female.my fishes are th ff.:

-japanese carp
-black moore
-swordtail
-black molly
-guppy
-koi

but i really dont know how to determine if it is a male or a female.

i hope you could help me with this.thanks for your time..

-waecky