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Your betta fish is a female if she has smaller fins than an average male.
Well the loin head male has rings around his eyes and longer fins than the female. The female will often have more variety of colour on her body but generally the male will look more stunning with his longer fins!! Hope this helps :)
Examine the pelvic fins on the bottom of the shark. Male sharks will have two, tubular claspers trailing off the back part of the fins. Female sharks will have normal, rounded fins. The claspers on the male shark are its reproductive organs and are used to internally fertilize the female. Juvenile males will have smaller, short claspers and can be harder to identify.
No, it's the male that has the long fins
Male Needlefish have a black edge to the dorsal and anal fins. You can find Needlefish in fresh water.
male snakehead fish are thin and has bigger fins and head while female has fat body and has smaller fins
It is pretty hard to tell. Wait until they get older then see which ones have longer fins, and shorter fins.
usually a male has longer tail fins but they are about the same for side fins
A female has two pelvic fins and has an extra two fins on top of that on either side of the barb or the sting while the male does not. A male also has two pelvic fins but no extras like the female. Also, females are considerably larger than males.
the males have longer fins
Males have longer and fuller fins and females have shorter fins
The female will do something with her fins and let the male know but when they do mat you have to be right there when it does because the male will kill the female but not the eggs. when the eggs hatch you have to take the male out or he will kill the baby's.