Animal Stories - Swordtail Fish

Animal-World Information about: Swordtail Fish

The most popular aquarium fish next to the Guppy is most certainly the Swordtail!
Latest Animal Stories
michelle jehle - 2019-02-15
I just got my son's fish tank as he had to move, it is 30 gallons I believe and it contains a male and female swordtail and also a few babies. I would like to get some live plants but don't know what to get, I also bought a breading net because he thinks she is pregnant although he never used one. I've been reading articles on line about their care and would also like to get a few more females. Can I get a green swordtail? I read and wrote down the fish that are compatable also, any help would be appreciated. Thanks

Samantha - 2016-05-02
Hello. I just started my first aquarium about a week ago. I'm sad to say that I was not educated properly before I added fish to my tank as I only thought you had to get the temperature right for them. Well all of the fish I added to my tank died in less than a day, so I started doing research online. I waited several days before I added new fish. I brought home a test kit to be sure that it would be safe for new fish to live in. So I added 2 male red swordtails. One looks totally fine but he sits at the bottom of the tank a lot and I haven't yet seen him eat. The other one moves more, but he appears to have the clamped fin? But last night after I turned the light off to the aquarium, his fin flared out more. Today, neither of them ate any of the food I put in for them this morning and aren't moving around much. Someone please help! I really hope they're not sick and we're gonna lose more fish!

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  • Nordic - 2016-05-17
    Hey add 1g aquarium salt to every 10L of water to your tank. Fishes my be suffering from initial bad parameters. The salt will help them feel better.
  • Anonymous - 2018-01-29
    Have you researched the nitrogen cycle? Likely your tank hasn't cycled.
Anonymous - 2017-09-22
meu peixe ele ta com o a cada puxada parecendo que espada com preto oque fa├žo (Google translation: my fish he is with every pull like that sword with black what I do)

Jrock - 2017-08-08
I need help I have a female swordtail pregnant and am very interested in breeding, I've removed her into a tank,for her birthing but she's has shown signs of significant stress without the male being present the 2 platys in the tank are not showing the same agressive frantic symptoms I need information on how to keep this breed of fish from becoming stressed in its breeding tank, should I keep the male in the tank these fish never had a behavoural issue before I've separated them.

wyatt Shaw - 2014-12-28
i have two tuxedo platies and two ornage platies and a red swordtail i just got them yesterday and i am new to this aquarium thing but i was really wanting to get an eel i have excelllent hiding spots in the 50 gallon tank including a brick and some rocks stacked to create a tight hole but i am worried about the eel eating the other fish what should i do and what type of eel should i get if i do get an eel????

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  • Clarice Brough - 2014-12-29
    Sounds like a great tank! You could add one of the Spiny Eels, like the Zig Zag Eel, that don't get too big. They stay close to the bottom, feed on small foods like worms and brine shrimp... and mostly ignore their tankmates.
amalsyikin - 2014-11-22
I've just realized that my swordtail was having the babies when she's dead. I took her body out from the tank and saw her babies were still inside the womb(didn't noticed alive or not). I buried them at my backyard :(.. My question : 1) what may caused the dead? The mother is stressed because of giving birth? Or else? 2) should i took out the babies out of the womb? thank you (who replied me the answers :) )

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  • arriyah - 2014-11-22
    you should have took the babies out of the womb
Reply - 2014-10-19
i want to purchase a gold tux swordtail please advise where i can order thank you....emma lee

Connor - 2014-10-15
I have one male red swordtail and he is a gorgeous fish and gets on with my red finned platies, mollies, clown loaches, penguin tetras and my neon tetras. But does anyone know when my female red tail platy will give birth because she has been pregnant for ages and has had no babies?

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  • Clarice Brough - 2014-10-17
     The average gestation period of a live bearer is about 28 days, so if its been longer than that she may not be pregnant.
  • Connor - 2014-10-19
    Thank you very much for your help and during the time we have had we have had 5 babies and we think it is her because she has got a lot thinner.
Trevor - 2014-09-15
Swordtails do not change sex, the situation you are referencing is a late developing male which occurs when there is already large male in the tank. Other males will develop slower until they reach a size that can compete with the tanks dominant male and will then develop their male characteristics. I have researched it and seen t twice in my own tanks, after which the late developing male would go on to father many fry of his own. This I am sure of from pairing the new males with young virgin females to be sure the changing of sex did not occur.

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  • Clarice Brough - 2014-09-15
    You're absolutely correct Trevor. Thanks so much for bringing this to our attention, we will adjust the information right away.
imah - 2014-09-07
Hello I have a leopard pleco and I think it is pregnant so I have been doing some research. I needed to see if it was an egg layer or a live bearing fish. I searched it up and one site said that it was a live bearing fish and another site said that it was an egg layer. Also if it is a live bearing fish what are some signs to look for when it is about to give birth? I hope someone can help. Thank you.

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  • Clarice Brough - 2014-09-07
    Catfish are egglayers, as are the majority of freshwater fish species. Livebearers are mostly swordtails (like this fish), guppies, mollies,  and a few others. You can see an overview of livebearing fish on the main page of this Livebearer Aquarium Fish Atlas.