If you look under the tail where it goes to the bathroom, during breeding time it will swell up. Also, a male's tail is bigger than the female's tail. The female's stomach could also be bigger than the males.
Most sharks that are male have a extra fin on their belly or they have a extra fin at the top. Sharks lay eggs and do not give live birth.
check it
Feeder fish, How do you tell male from female of the?
You can tell a male angel fish from a female one by all the colorful stripes it has. [the male one]
Turn it over and have a look
their bellies
By performing an experiment
The male is larger and has much larger fins and much showier, brighter colours than the female who is quite a drab little fish.
you can tell if one of the female fish has a puffy stomach a female has a big shape of a V and a male has a smaller one.
While the fish is swimming, look at the fin on the top of their body. If it's tall then it's male if it is short , it's a female.
The male of the species has brighter colours and is a much larger fish than the female
if it is beautiful it is female.if it is handsome or ugly it is male
in male fighter fish there is very deep colour and in female there is very fead colour female have a egg sack but males dont have
bass clef its obvious