FAQs on the Rainbowfishes
Related Articles: Rainbowfishes, Fishes at the rainbow's
end; An introduction to the Atheriniformes, the
rainbowfish and silversides by Neale Monks
Related FAQs: Rainbowfishes 1, Rainbowfishes 2, & FAQs on: Rainbow Identification, Rainbow Behavior, Rainbow Compatibility, Rainbow Selection, Rainbow Systems, Rainbow Feeding, Rainbow Disease,
Pseudomugil furcata fry
Hope you are all well.
I have been attempting to breed Pseudomugil furcatas (Forktail
blue-eyed rainbow fish) for some time now. I have successfully obtained
eggs from breeding mops on a regular basis and some mature to fry. I
have been gently moving these fry to a small breeding net with plants
covering the surface within a larger tank (same as their parents and
where the egg container is kept for temperature control). Out of about
seven that I spotted, three weeks later, there appears to be only three
left. I have been feeding them regularly (3/4 times per day) on
Interpet egg based fry food (hoping this will also induce infusoria)
and more recently with flake food dust (fine crumbs). After three
weeks, the remaining fry look no bigger than when they were first
hatched. Water param.s are below:
Temperature - 26 degrees Celsius
Ph - 8.0
Any suggestions where I might (or might not) be going wrong?
Many thanks once again.
<The food is probable too big. Do try infusoria, traditionally grown
by putting lettuce leaves in jam jars on window sills, often with
snails to start to the decay process, but there are various other
methods that work well too. You could also try Brine Shrimp nauplii.
For what it's worth, I've found Hikari First Bites rather
better than the old Liquifry product.
"Interpet Guide to Fish Breeding" by Chris Andrews is a good,
cheap entry into the methods of breeding fish generally, and has lots
of useful advice.
<Patrick, Dr. Nunn>
I popped into Wildwoods and acquired five Forktail Blue-eyes
Pseudomugil furcatus for my community fish tank (everything is fine
although I thought the Dwarf Gourami were going to have them for dinner
to begin with! So I'm thinking I'd like to breed these
wonderfully lively fish. I've read the following article but was
wondering what would be good to use as a fish egg fungicide?
<My fave, though admittedly very olde-timey is still Methylene
Here is the neat article: http://www.aquarticles.com/articles/breeding/McFarlane_Forktail.html
Dr Patrick Nunn
<Please read here on WWM re: http://wetwebmedia.com/methblueart.htm
plus on the Net re this application. Very safe, quite effective.
Re: Boesemani rainbows
struggling, repro. beh. obs. 12/24/10
Comment on FAQ link:
"Two days ago I noticed one the rainbows swimming almost vertical
with head down and tail up. He is also using his whole body in a wiggly
motion as he swims. There are no spots or marks on him and he is eating
fine. At times he looks like he doesn't know where he is swimming
to because he almost bumps into other fish."
Thinking this is perfectly natural part of mating. My males all do
this, while intensifying their colors and displaying a big orange
stripe down their head. Then they chase the females as such, lowering
their nose to the ground tail up to "show" the lady his big
orange stripe and attract her interest (though most of my males are
harshly rejected lol) They do it most during times where the tank light
is off, but the room is lit (dusk/dawn lighting effect)
<Ahh, thank you for this input. Bob Fenner>
Re: New Freshwater Tank...
sel./sexing Rainbows Neal/Crew: Thank you for the quick and
thoughtful reply. I looked at pictures of the Boesemanni rainbow, and
they are indeed striking fish. I am having trouble, however, locating a
good source for them. Live Aquaria can supply, but state that their
fish are too young to differentiate between genders. I could wind up
with a huge preponderance of one or the other. Any ideas? Take my
chances on gender selection? I like your suggestion about a large
school in my 6-ft tank. Do you think that 20 would be a good number?
Thanks tom <Hi Tom. Sexing Rainbowfish is more of an issue where the
males and females look different. Typically, people only (or mostly)
buy males of species like Glossolepis incisus because the males are
amazing (brick red) and the females are less colourful (silvery-green).
But then they find the males don't develop their best colours and
sometimes become aggressive. For M. Boesemanni, I think you're
going to be fine "taking pot luck" because boys and girls
look the same (particularly when young). A school of 20 would be
superb, especially as they mature and develop full colours. Do make
sure you give them a nice varied diet that includes algae and
crustaceans, and these seem helpful for making the best colours. This
species is widely used in the UK for fish tanks in shops and offices
because they are so colourful and yet very hardy and easy to keep.
Australian Rainbows ~ <Ananda here...> I was just
wondering if there is a way to tell the females from the males with
Australian Rainbows? <These are not the easiest fish to sex, but it
is possible. Sometimes the body shape of the female is shallower than
that of the male.> I have 9 of them in my tank, and two of them have
really different tail fins, different than the others that is... I have
a few who are a really pretty peacock purple, and silver, and then a
few others a real deep peacock shiny green and some sapphire and silver
colored ones... Any ideas here? <With all the species and subspecies
of rainbows, I'm not going to try to guess which may be males and
which may be females. I think you may have two or three species. Your
best bet may be to find some good photos of the species you have -- try
the Aqualog series, if you can find it.> <You're welcome.