first spawned C.sanchesi in September 98. I consider
it to have been a successful spawning, in as much as
I have raised two fry up to adult colour. Both fry are
now over 22mm long and doing well. The details that
follow are of the spawning I have been observing today,
21st November 1998.
Tank = 450mm x 250mm x 180mm.
Furnished with a box filter and a large piece of Java
Water Conditions = Temperature : 74deg F.
Ph 7.2, GH 9, KH 2.
Fish =1 male 35mm long, 1 female 45mm long. Wild imports.
The male has slight deformation of the caudal and dorsal
The spawning followed the typical Corydoras
T mating position. The fish took over eight
hours to lay 50 plus 1.8mm diameter eggs.There was none
of the usual hustle and bustle, with the male chasing
and pestering the female. He would just gently glide
around her offering himself sideways on, first from
one side, and then the other. Eventually the female
would make contact and they would lock into a clinch.
During this locked position, both fish would quiver
for a few seconds. Between 3 and 7 light orange coloured
eggs would be deposited into the females ventral fin
pouch. The pair would then part, with the male wandering
off rummaging in the gravel for food, and the female
just leaning on one pectoral fin resting. She would
rest for anything up to ten minutes before scurrying
off looking for a suitable place to place her eggs.
Most of the eggs were deposited in the Java Moss, with
just one or two stuck to the tank sides and a couple
on the side of the filter. Based on the first spawning
the eggs will take four days to hatch, and the fry are
large enough to take newly hatched brine shrimp three
days after hatching. Further foods will be micro worm
and powdered flake, followed by larger offerings of
grindal worms and sifted Daphnia, as the fry get larger.
When the fry get to around 12mm whole tablet food will
also be given. The fry swarm all over these tablets
when they are offered. Its a magic sight to see
dozens of fry gathered all around and feeding so avidly.
Small water changes are made every day once the fry
are feeding, with particular care being taken to use
water of exactly the same temperature.
If the temperature differs by more than a degree it
can wipe out a complete brood. These water changes are
essential if the fry are to develop to their full potential.
at 7 days.
at 1 Month
at 10 weeks old
Male with longer upper lobe to caudal )
Photo and Drawings are by the Author.
If you would like to get in touch with Ian personally
about this article please E-Mail him at : [email protected]