FAQs on the Zebra Danios
Related Articles: Barbs, Danios &
Rasboras, A Barbed Response; Wrongly maligned for being
fin-nippers, barbs are in fact some of the best fish for the home
aquarium by Neale Monks
Related FAQs: Zebra Danios 1, Zebra Danios 2, & FAQs on: Zebra Danios Behavior, Zebra Danios Compatibility, Zebra Danios Selection, Zebra Danios Systems, Zebra Danios Feeding, Zebra Danios Health, Zebra Danios Reproduction, & Barbs, Danios, Rasboras 1, Barbs, Danios, Rasboras 2, B,D,R Identification, B,D,R Behavior, B,D,R Compatibility, B,D,R Selection, B,D,R Systems, B,D,R Feeding, B,D,R Disease,
Type of fish? 6/25/16
<Seven megs of uncropped pix? WHY?>
I am just wondering what type of fish this is? Any ideas?
<Brachydanio rerio, w/ clipped on jellyfish DNA. Bob Fenner>
Thank you and one more question....... 7/18/12
Thank you, Neale for such a prompt reply! I really appreciate your
advice, and reassurance :)
If I could impose on you again for help....... I just got some
"Rosy" Danios, and when I looked online for information on these
beautiful fish, I had a hard time finding anything.
<These are Red Glofish.>
Most of the pictures I saw looked very different - much paler in colour.
I thought they looked more like the genetically modified Red Zebra
Danio - Glofish? (Supposedly, Glofish are illegal to import to Canada.
I live in Ontario.)
<Yes and yes.>
I have attached photos I took. Please forgive the poor quality.
These are busy little fish! The "zebra" stripes are quite visible when
you look at them. The stripes are more visible in the flashless photo,
and not so visible in the flash photo. Are you able to shed any light
on this for me?
<Think you nailed this yourself. Care much like regular Zebra Danios, though
likely these will be a trifle more delicate, as with any inbred,
Thanks so much,
|Re: Thank you and one more
Thanks again, Neale!
It's nice to have confirmation. I quite enjoy watching these active
fish! They love to play in the current from the powerhead.
Till next time.
<Real good. Cheers! Neale.>
Brown Danios 7/6/10
I notice at the aquarium stores that some zebra Danios are silver with
blue stripes and others are brown with blue stripes. Is this a
male/female thing or are they a different species?? Thank you
<Yes, some Zebra Danios (Danio rerio) have gold between the blue
stripes, while others have silver between the blue stripes. Usually
it's the males that are more golden and the females are more
silvery, but this isn't always the case, and it can often be
difficult to tell them apart because they swim so quickly! Note that
there are some other Danio and Devario species in the trade, some of
which can look very like Zebra Danios at first glance, e.g., Danio
kerri and Dario aequipinnatus. Many species will hybridise, confusing
things even further. There's a paper in the journal
Nature with a matrix of photos that illustrates this point nicely,
"Glofish" ID... Zebra Danio care...
I have recently seen a fish called a "Glofish" - a relative
of the zebra, yet genetically enhanced to exhibit colors -
<Not "a relative" of the Zebra Danio (Danio rerio) but the
same species, just with an extra gene. Maintenance is identical, though
they're likely to be somewhat delicate by comparison to standard
Zebra Danios thanks to inbreeding and less genetic variation.>
I thought they would make an interesting addition to my tank - What
size tank do they require?
<Like Zebra Danios, tank 60 cm/2 feet long is the key thing; these
fish get to about 5-6 cm in length and are highly active. In small
tanks they're less happy and prone to becoming frustrated
Are they a shoaling fish?
<Yes; keep in groups of 6 or more (either 6 Glofish, or a mix of 6
Glofish and standard Zebra Danios, as you prefer).>
Are they compatible with other species of fish?
<Like Zebra Danios in this regard. Community fish, provided not
mixed with anything too slow that might be nipped or otherwise
In general, what is the best way to keep them healthy and happy?
<As Zebra Danios, with due allowance for their preferred cool water
temperature -- 22-25 C is ideal -- and their need for clean water with
a good current and lots of oxygen.>
Also, Do they reproduce in species-only tanks?
<In theory they should be easy to spawn, just like Zebra Danios. But
when you buy these fish, you actually accept a license that prohibits
you from doing so (bizarre as that sounds):
Since these animals aren't sold in the UK, I don't know anyone
who has actually bred them (the European Union has restricted sale of
genetically modified organisms on public safety, animal welfare and
Can't say I'm all that bothered by their absence, and I'd
encourage you to look for some of the naturally occurring Danio species
(like Danio choprae and Danio margaritatus) that are much prettier, in
my opinion, and very definitely legal to breed! Cheers, Neale.>
Freshwater (Brackish?) Fish ID 4/16/08
Hey there WWM Crew, how it's going. Thanks for all the help
you've given me in the past. Today I have a picture from a
friends tank. The other day she showed me a fish she had
collected inland near Biscayne Bay (East Coast Florida, USA),
which she has had residing in her freshwater tank for over a
year. The fish seems very healthy and happy, but I'm afraid I
don't know enough about freshwater systems to help her
identify it. I thought it was maybe a fish she caught in brackish
water (since it was so close to the bay) and it was just living
comfortably in her freshwater system. Can you help me identify it
please? Cory, Miami <Mmm, methinks your friend is pulling your
fins... this is a genetically modified "GloFish"...
Brachydanio rerio... see the Net re. Highly unlikely released,
found alive where stated. Bob Fenner>
|Re: Freshwater (Brackish?) Fish ID
4/17/08 Your absolutely right on the animal ID. Pretty cool
with the Red Fluorescent Protein. But she swears she collected
it... the only thing I can think of is: The place where she claims
to have collected it is very very near the Florida International
University campus; the Zebrafish is a very commonly used system for
genetic research, perhaps they were using this variation/species at
the campus and released them when then were finished. Just a
thought, thanks for your help. Cory, Miami <Yikes... am hopeful
this contaminant is just one of very few... Trouble when any
non-indigenous species gets loose... Cheers! BobF>
Freshwater (Brackish?) Fish ID 4/17/08 I agree, we have
enough invasive exotic species here in Florida. Thanks again for
your help. Have a great day. Cory, Miami. <Agreed and thank you