Animal Stories - Zebra Danio

Animal-World Information about: Zebra Danio

The Zebra Danio is a popular aquarium fish favored for its charm and grace as well as its hardiness!
Latest Animal Stories
zoeb - 2019-06-05
I bought a new tank(Dimension:-L24"X B12"X H14") Kept 8 guppies , 15 neon tetras and 4 Zebra Danios, total fishes were 27, i made a water change on the very next day by adding water to bucket and putting antichlorine and later after 30 min, putting the water in the tank. the 3rd day was a death day , 1 guppy died and then till today ie:- the 7 day , im just left with 8 fishes. initially i was suspecting my filter , then the water, now im left with no guppies, 2 zebra danios and 6 neon tetras.

Ive been investigating what i did wrong, ive seen that 1 zebra danios keeps on chasing other neons and even nipping.

i wonder if water was the problem or zebra danios was the reason or both..

do zebra danios even attack guppies

the chasing zebra seems twice the size of any other fish in the tank.

please help

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  • Dave - 2019-06-05
    More than likely the aquarium was not cycled. How long has it been set up? you should run the filters for about 6 weeks with only a couple of hardy fish in order for the bio-filter to establish itself.
  • Robert - 2019-09-15
    Zebras are very hardy and top surface fish can even be kept in cold water they always fast moving and i guess they need some good swim space - they should be in a shoal - neon's are more middle of the tank and also shoal fish - they need accurate temperature and the water needs to be right - changing water just a day after you introduced new fish is no good - means you changed them twice in short time and that can be hard for any fish to adjust. i never had Zebras doing any harm to any other fish. still must have nice 'furniture' in the tank so any fish got a chance to hide away from each other
Doug - 2009-03-13
Don't know why it's not on here but zebra danios will kill neon tetras. I have had fish for 15yrs & every time I put zebras in my tank they kill my neons. It's happened 6 differnt times. Has anyone else had this problem?

Click For Replies (22)
  • chad - 2010-02-19
    I have 4 glofish and one zebra danio. I recently added one glow light tetra and it was very calm. I thought these fish would get along, but now two days after I buy the tetra; I come home and my glofish had killed my tetra.
  • Gord - 2010-04-21
    I have had the same experience. I have introduced neons to a community of danios and bloodfins twice, and the neons disappeared within a two or three weeks. I would advise against trying to house them together.
  • caity - 2010-05-24
    eeee really I have not got them yet but I am getting soon. Do the zebra danios eat the neon tetras I have them :(
  • lps - 2010-07-25
    I'm having that same exact problem! How do I stop it from happening?!
  • w. r - 2011-01-16
    Yes, I first started my new tank with 1 zebra danio and yesterday I bought a neon tetra soonest I put it in the tank the zebra started to chase him, I return it to the store and came with another zebra and the biggest one started to chase the small zebra, are this fish crazy or what?, I think that they might need xanax.
  • Alden Finnie - 2011-09-10
    Wow, That's weird. I have 18 neon Tetras and 6 Zebra Danios. They get along fine and it's been 8 months. The Danios only seem to harmlessly bother each other. Chasing each other in a big circle around a rock.
    Thanks though. I'll keep an eye on them.
  • carla - 2011-09-15
    Hi I would just like to say that I disagree with you, as I have danios and tetra living together, and have had no problems. They are highly compatable. Mine have been living together for over 6 months and are very happy together,
  • Anonymous - 2011-10-18
    We have had 2 danios in with our tetras for over a year and there has been no problem. The male danio chases the female and the tetra very aggressively, but that is all.
  • Kim - 2011-12-01
    I have 8 big zebra danios and I had 24 neon tetras, I now have 7 neons left! I had never thought of this before, but they are the only fish big enough to eat the neons, so it has to be them! Damn it they have decimated the neons, going to have to sell the danios I think.
  • Tanya Altice - 2012-02-20
    When I had my tank I learned that a) you have to provide schools for each fish danios like at least 5 like fish in the tank. Neons like even more than that. b) generally you buy neons very small! and and small new fish don't do well with established bigger fish. So I would say get a small 5gal tank and set it up for a school of about 8 neons and let them get bigger than what you normaly buy them. Then put them in your tank with the others and give your danios some friends to play with so they will leave the others alone. Also neons aren't very hardy. I have had several trips around and around with neons where they simply die within a week of buying them. So be prepared to spend some time building a good school of neons.
  • Alonzo T. Fells II - 2012-04-15
    I have to disagree with that. I had group of 5 zerbra danios and they never had bother the neon or the rest of mine tetras. Yea, a little bit of fish nipping but they play tag with mine rams lol
  • Maeve - 2012-05-20
    Oh, really? I didn't know that. Do danios get along with goldfish?
  • Jeremy Roche - 2012-06-26
    Zebras Danios are famous for stressing and harrassing other fish.  They are small but they are very fast swimming and in groups this can be taken as aggressive and make others stressed.  Neons are easily stressed.
  • aiden - 2012-06-26
    i just put 10 neons in my tank with my 2 zebra danios, (there were 3 but the others bullied the smallest until it died) 3 hours later the first neon is dead and they're trying hard to single off another!
  • Anonymous - 2014-06-06
    I have zebra and leopard ones they killed my goldfish 😒
  • moonisha - 2015-11-11
    my big fish chases the small one
  • Nikki - 2015-11-14
    These guys have killed and eaten 5 mollies, 4 male guppies, 5 neons (since last weekend), 2 bottom feeders, a redtail fin shark (since last weekend). All since Christmas. Only things that have made it are 5 red tetras that the neons tried to stay with because the Zebras won't go near them, and my son's big gold fish he won at a carnival. I'm getting ready to put them in a tank of their own so I can get other fish. Oh we also have a small catfish that stays hidden until feeding time.
  • Skyler Goument - 2015-11-14
    Yeah I disagree when I first set my tank up I got 5 neon tetras and 2 danios and they have got along and lived well for almost 2 years now. Recently I aded a few more smalll neons and some of the others had died and the danios are treating them pretty well. Just make sure you have less danios then neons :)
  • Skyler Goument - 2015-11-14
    Niki, are you sure it was the danios that killed them and not a disease or a tank problem? As danios are very hardy they wouldnt have been affected by it? 

  • Steve - 2017-04-27
    I put four zebras in my 18 gallon aquarium to cycle it. Then, I added six neon tetras, six panda corydoras, three Virginia corydoras, six galaxy rasboras and four male guppies - not all at once, of course.

    There is no fighting or nipping. Everyone gets on great. Four of the rasboras disappeared quickly, but the other two are fine. (They are very tiny fishes.) I don't know what happened to the rasboras.

    During the last two or three weeks, one neon and one panda vanished. I don't know what happened. Maybe they just died of natural causes. No carcase was ever seen. I replaced the neon and the panda yesterday.

    I have seen nothing to suggest that the zebras are attacking the neons or any of the other fishes.
  • Ren - 2018-06-22
    The reason is because neons are so small
    that it looked like food to the zebras. I
    recommend you get bigger fish.
Jack - 2016-07-31
I have a spotted danio and I went on holiday I got back and it had a hole on the back left of its tummy. Also it was breathing heavily. Any ideas what caused it?

Mishel - 2016-01-18
I have had Zebras for a while and never suspected them to be aggressive until I upgraded to a larger tank. I added 7 neon tetras and my zebras harassed them to the point where 6 died off. Some tetras were half eaten. They even tore up 1 male guppy I had. I just finished feeding them and the guppy was fine until I checked back on it 3 hours later and the back fin was torn into shreds along with marks all over its body.

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  • shivam sachan - 2016-06-30
    Hi mishel, sorry to hear about your neon tetras.. i have 10 danios and along with them i have 20 guppies and 10 neon tetras and lots of other fishes to.
    But i had no problems with zebras and neon tetras they are good and they love each others company. well recently some of my neon tetras died but it was my newly bought killi fish who killed them.. i would like to hear did you had any other fish in tank when your tetras died?
Kayla Fields - 2015-10-20
I had 3 danios, 2 zebra and 1 longfin leopard! I just got 2 blue gouramis, and a pleco, and i think one of my zebras jumped out of the tank while i was floating the other new fish... he went missing! and then my 2 danios started fiercely chasing eachother, so I jus brought home 4 more leopard danios... they are all figuring out the tank now, but the gouramis and danios seem to get along great and the pleco is just the usually pleco... i want to add in some cherry barbs... anyone have any issues with them?

Connor - 2014-10-15
I have two Zebra Danios and they are lovely fish they are always chasing each other and having fun. They get on with my neon tetras, glow light tetras, my lemon tetras and my cherry barbs, my guppies, my honey gourami and my horse face loach. They are lovely fish to have so I recommend that you have them in a community tank.

Fish keeper - 2006-08-09
I have 4 of the little guys and they are great fish. they will some times split up from their group and swim around in a loosely formed group. I might add 2 or 3 more to see if I can get a better schoaling behavior. great fish, fun to watch. Enjoy your danios!

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  • verna - 2013-04-30
    hi, i also have 4 longfinned zebras,i was wondering if yours will feed off the bottom after feeding time,mine seem to be scavenging the question is do i still need a bottom feeder? or would the zebras attack them?also let me know if they do school better with 5 or more,mine are quite active and go everywhere independetly.thankyou
Sal - 2012-06-27
Very interesting, I just started my tank, I have 5 danios, one week into the cycle they also went crazy doing the fin nipping thing, but have stopped and only chase each other now. I have since rescued two pink danios (glofish) and introduced them to my tank with no problems. However, after the cycling period I want to add 4 cory's, 1 siamese fighter and 2 platies? My tank is 57L, any comments/advice?

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  • Jeremy Roche - 2012-06-27
    Ammonia spikes will make the fish act out if tank is cycling.
  • Tate - 2012-08-22
    I have a 10gallon with otocinclus, a green Cory, and zebra danios all doing fine. I tried adding my sisters fighting fish and he kept chasing and trying to eat the danios. I wouldn't reccomend the platies, due to previous comments about the neon tetras
Maeve - 2012-05-23
My friends brother has 2 danios and a black moor. Both danios have bitten his fins and tail off.

Maeve - 2012-05-20
I have heard about them being agressive and that they eat alot, but i found that out after i had bought him. It seem to eat a lot of tubiflex so i let him eat alot of that. But he doesnot eat much of the flake food i give him. I have an oranda and 2 platties in my tank as well as him though 1 of the platties is in a breeding net as she is pregnant. I have seen no signs of him showing agression to the others. Will he get more agressive soon or what? I do not know what to do! Plz help!