Light grey to gold body with blue-green stripe down side. Length
Maintenance: This species prefers water
to be colder than is normal for Corydoras and I would recommend
72F/22C. Initially I housed them in an 18x12x12 tank with
a sand substrate and Java Fern plants.
Filtration: Air driven box
filter in one corner and sponge filter in the opposite corner.
Prima, quality flake, tablets and frozen bloodworm. Normally
I don’t use live food with the exception of newly hatched
brine shrimp for fry. I am currently experimenting with
Grindal Worm cultures.
quite sometime trying the usual tricks with cory’s to
get them to spawn i.e. large water changes using cold water
which drops the temperature about 6 degrees, nothing was happening.
I more or less gave up on them. April’97 eighteen
months after their arrival I decided to use the tank they
were in for something new and moved the C. nattereri
to a 27-gallon tank (39"x15"x12"). Filtration being external
canister plus a large double sponge filter.
No substrate was used but included a large piece of Java Moss
which covered half of the tank. I then left them to with no
further disturbance from myself.
At the end of April 1998 while during
my usual water change in their tank I moved the Java Moss
and noticed a young catfish darting away towards the back
of the tank, it had to be a young nattereri as this
was a species tank.
My five original nattereri consisted of four males
and one large female which was almost twice the size of the
males. I decided to try and get them to spawn again. Sunday:
25% water change was carried out using water straight from
the household water supply pH 8.3. Prior to this the tank
conditions were pH 6.0 and Temperature 73F/23C. After the
7-gallon water change I knew this would make quite a change
to the water parameters but I decided to go ahead anyway.
Tues: I removed nine eggs from the Java Moss.
Day 3 Wed:
Days 4-5 Thurs/Friday:
A further 19 eggs removed.
This totalled 40 eggs, which were placed in a small show tank
with water from the spawning tank to which I added one drop
of Methylene Blue. An airline was placed in the small tank
to keep the water circulating. Any infertile eggs were removed.
The fertile eggs were tan coloured and got darker until on
the third day they hatched. A further two days and they were
free swimming, approximately 1/8th on an inch in
The following weekend I repeated the same procedure again
with the water change and on day three I collected 24 eggs.
By now my compliment of nattereri young numbered 43
- ½ inch fry. During these two "controlled" spawnings 64 eggs
were collected of which 12 were infertile and 12 fry died
giving me 43 fry. There were also some fry darting about the
parent’s tank. It caused me a bit of concern as to why
I lost 12 of the fry as they were being fed with micro worm,
newly hatched brine shrimp and plenty water changes using
water from the parents tank.
I soon realised that the tank holding the fry was sited 3
feet higher than the parent’s tank and was at least
5 degrees hotter. I then moved the fry tanks to a colder part
of the fish house and since doing that there have been no
At the age of six week’s the fry were moved from their
[ 12"x 10"x 8"] rearing tank to a 18’’x12’’x12’’
growing on tank and they will moved on to a larger tank as
One month after the first spawning I repeated the whole procedure
yet again. Day 3: I spent
quite sometime removing 97 eggs from the Java Moss. Tank conditions
at time of removal pH 6.5 temperature 71F/21C.
Conclusion: Never give
up trying to breed Corydoras Catfish as they will
surprise you all the time. This
article was written for publication in The Paisley & District
Aquarist Society’s Newsletter and the Northern Area
Catfish Group (now Catfish
Study Group) Newsletter, and ScotCat. if they wish
to use it.