Pregnant Guppy? - Page 2
Tropical Fish

Tropical Fish Keeping - Aquarium fish care and resources » Freshwater Fish and Aquariums » Freshwater and Tropical Fish » Livebearers » Pregnant Guppy?

Pregnant Guppy?

This is a discussion on Pregnant Guppy? within the Livebearers forums, part of the Freshwater and Tropical Fish category; --> Common livebearers are easy to sex once they are mature. The whole thing is based on the shape of their anal fins, the fins ...

Check out these freshwater fish profiles
Guppy
Guppy
Platy
Platy
Reply
Old 04-18-2009, 10:46 AM   #11
 
Oldman47's Avatar
 
Common livebearers are easy to sex once they are mature. The whole thing is based on the shape of their anal fins, the fins right next to where they eliminate their waste. Swordtails, guppies, platies, mollies and limias all have the same basic shape for a male and the same basic shape for a female. This is a picture of a male Heterandria formosa that also has the same fin shape for a male.The anal fin is long and thin and is correctly called a gonopodium.



This is a female of the same species with the typical triangular anal fin.



The pictures are a bit grainy because they have been blown up to show the fish. The actual fish are only about 2 cm long when full grown.

There is another less common group of fish called goodeids that are also livebearers and are sexed using anal fin shape. The generic name for goodeids is splitfins so if you see a fish with splitfin in its common name it is probably a goodeid.

The anal fin on this male Xenotoca eiseni is showing the typical split in the anal fin with the front part of the fin shorter than the back part.



The female Xenotoca eiseni in this picture shows the typical single triangular fin of a goodeid.



With good lighting, and being pulled back to show more than the fish, a male Xenotoca can look more like this. I love the colors they have when they are feeling safe in the tank. Unfortunately, when pulled back, the fin shapes are hard to pick out.

Oldman47 is offline   Reply With Quote
Old 04-18-2009, 08:42 PM   #12
 
parakeeto225's Avatar
 
oh ya..i forogt...males have more color and longer tails and fins than females....
parakeeto225 is offline   Reply With Quote
Old 04-19-2009, 12:52 AM   #13
 
That looks like a male to me =)
bigali is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pregnant Guppy... emmers Beginner Freshwater Aquarium 5 01-18-2011 07:13 PM
my pregnant guppy? fryup Livebearers 11 02-24-2010 01:41 AM
Pregnant guppy emmers Fish Breeding 6 11-12-2009 07:03 AM
Is My Guppy Pregnant? Guppyluver4ever Fish Breeding 6 05-30-2009 08:23 AM
Pregnant Guppy inuit_jay Livebearers 8 06-05-2008 01:52 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -5. The time now is 01:14 PM.