Well, The Male Zebra Danio are usually "Smaller and Slimmer" while the Females are Bigger especially when they are going to have fry.
The same way you tell if it's a boy or girl dog or human.
uhmmm..... penises?
He's a boy, cant you tell by the name?
it has a spiky tail if its a boy and a smooth tail if its a girl
A boy hamster will have a little penis, and a girl hamster has a small vagina. Hope this helpsIf it is a female it will have a hole right below its tail. and males have two holes that are further apart.To tell if your hamster is a boy or girl first look at its bottom a girl hamsters bottom is not attached on the sides the boys isYou pick up the hamster carefully and lay the hamster on his/her back. If you see two holes close together, its a girl. If you see one hole and one you know what, its a boy.The pet shop should tell you but if not you can go to the vets. Most pet shops sell boy hamsters anyway, they keep the girls for breeding.
First I'd best tell you that any kind of fish can be genetically altered to make it a 'glo-fish'. The most common species available is the Zebra danio. (Danio rerio). If it is a Zebra danio, the females are chubbier than the males around the tummy when they are in reasonable condition.
when they mate they get 2 Y genes from the mom(the zebra or the quagga) and 2 X genes from the Dad( the zebra or the quagga) and then they combine and which genes are dominant tell whether its a girl or boy
A boy zebra and a girl zebra. Zebras are not a hybrid. Mules and Zorses are.
how do i tell if my my turtle is a girl or a boy?...
you cannot tell if the caterpillar is boy or girl
YOu can not tell the difference between a girl or boy starfish.
its harder for a boy to tell if a girl likes him
can you tell if a fish is a boy or girl by the tail
by asking its mother if it is a girl or a boy and plus you can tell by the face
you can tell if its a girl or a boy byits butt or eyes. if its a girl, it will have small pupils. if itsa boy, it will have large pupils.
i don't know if it is a boy or a girl
It can be either way, a girl can tell a boy that she loves him or a boy can tell a girl that he loves her.