How to differentiate from a male fish to female fish?

Answer 1

That really depends on the species. Some it's very easy to tell, some you can't tell by looking at all.

If youhave one or two in particular you are wondering about, add those to your question and we'll help

MM

Answer 2

In livebearers it is pretty easy...the anal fin on a female is like a fan (or an open hand with the fingers spread), and a male it is like a pointing finger...Guppy are real easy...look at the last fin under the male guppy...then look at the female...see the difference? All livebearers (that I know of) are like this.

In some egg bearing fish, the female has a different shape, color, or fin type. It is much harder to tell on egg bearing type fish.

I know in Betta, the only way to tell a Plakat (short finned) Male from a female is by the ovipositor (egg tube)...she has one..he does not. I found 2 Male Plakat Betta at Walmart marked as female.

Hope this helps a little.

Answer 3

For a lot of species the easiest method is by looks. The male will usually be brightly colored and fancily adorned (long colorful fins and the like) The female will be dull short finned and very plain. This is common in nature for several types of animals like birds. This arguably used to draw predatory attention from the female who in most cases cares for the eggs or fry. However there are exceptions like the Betta who's species has a colorful male but also guards the eggs without the female.
In other species though there is little to no "first look" differences. However on closer inspection you can usually note a small bone spur on the male near the anus used for breeding. Again there are species where you will not be able tell at all. This is likely in several fresh water aquarium fish like some Tetra species.
It can take Marine Biologist an entire career mastering the nuances of sex determination in the wild. That having been said, you can always watch and see which one the baby's come out off.

Answer 4

Female fish lay eggs.

Answer 5

I agree with MM with out knowing the type of fish we cant say.
some fish its easy to tell and other its very hard

Answer 6

Here are some examples
http://images.search.yahoo.com/search/images/view?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearch%2Fimages%3F_adv_prop%3Dimage%26fr%3Dks-ques%26va%3Dfemale%2Bguppies%26sz%3Dall&w=631&h=452&imgurl=zoology.okstate.edu%2Fzoo_lrc%2Fbiol1114%2Fpre-labs%2Fguppies%2Fimages%2Fmale%2Bfemale2.jpg&rurl=http%3A%2F%2Fzoology.okstate.edu%2Fzoo_lrc%2Fbiol1114%2Fpre-labs%2Fguppies&size=31.1kB&name=male%2Bfemale2.jpg&p=female+guppies&type=jpeg&no=2&tt=226&oid=f0d6bdc6bd9cd46a&ei=ISO-8859-1 (guppies)
http://www.oursimplejoys.com/freshwateraquaria/26-faq-breeding-livebearers.html (male swordtail)
http://www.bbayaquariums.com/black-molly.jpg (female mollie)
http://www.exiledplanet.org/images/fish/black_molly.jpg (male mollie)



hope that helps



EB

Answer 7

DNA test