Near your Pokemon's name, there's a symbol... if it's color blue, you're Pokemon's a Male... if it's color pink, you're Pokemon's a Female... Some Pokemon doesn't have gender... You can always check you Pokemon's gender this way wether it's a fish or not...
I want male lion head fish how can I sex them
if it has a slit
you can't
The sex of koi fish cannot be determined unless a)you dissect the koi or b)you witness the breeding.
There is no one specific way to tell the difference between male and female fish. Different species have different ques, and in the vast majority of fish, there is really no reliable external way to tell a fish's sex.
There is no definite way to tell the sex of a comet fish, but when the temperatures are warmer than usual, you may notice your fish is chasing another fish. The fish that is doing the chasing is a boy, ant the one swimming away, is agirl. The boy chases the girl, nudging under her belly, to try and make her release eggs. Hope this helps!!!!!
You can tell the sex of fish by the size and shape of their fins and tails. If in doubt, just ask them.
Look at the fish's bottom side. If the "anal fin" is fan shaped the fish is a female, if the fin is thin and pointed like a nozzle then the fish is a male. In the male this fin is called a 'gonopodium'
One way to sex a tropical fish is to observe a mature male or female. The female will eventually lay eggs and the male will show his penis if a mature female is around.The way to sex a tropical oscar fish is to simply observe whether or not the female lays eggs. It is not possible to tell by just looking at the fish.
Goldfish are pretty hard to sex unless you're very good at it such as a breeder, but in shubunkins, typically the female will be plumper than the male
In bluegills,it is really hard to tell the difference unless the fish are spawning.Males guard the nest from small fish that would eat the eggs,and it is then one can tell the males from the females.The male is larger,and of a darker color,with a coppery colored band across the head. Females are paler,with faded bands on the flanks.
have sex with a fish and get it pregnant