Angels - PageSuite

AQUATIC
AMAZONAS
12
NOTEBOOK
the midline. Under lateral lighting this makes a nice
color combination with the post-occipital scute, which
changes color to yellowish. The dark stripe becomes even
more prominent in females. Excited swimming around in
the evening during a period of falling barometric pressure
made me hopeful. But early the next day, all the fish were
once again resting quietly beneath the bogwood. After
feeding them with live Artemia I went to work. Great was
my jubilation when I came back to my fish room and saw
that the corners of the aquarium were full of eggs. After
collecting and transferring them to a separate container I
counted around 80 eggs.
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Problem-free rearing
The first larvae hatched after five days at 23°C (73°F).
All the fertilized eggs (around 90 percent) hatched into
catfish larvae. Another four days later the fry were managing
freshly hatched Artemia nauplii without problems.
Just a day after they started feeding the fry began to show
color. A dark band developed, starting in the head region
and running to the pectoral fin insertion. As a result the
head appeared to be separated from the rest of the body.
After around five more days, several dark dots appeared
along the back. After 14 days the head region,
set off by the black band, looked more yellowish and
created a contrast with the rest of
the finely dotted body. There were
four large, dark dots along the line
of the dorsum, and a further row
of smaller dots marked the midline,
below which occasional additional
dots could be seen. The size of the
little catfishes was now around .5
inch (1.3 cm).
After a further 10 days, when the
fish were almost five weeks old, the
transparent base color was replaced
by a yellowish shade. At this age the
catfish averaged about .7 inch (1.8
cm) long. At a length of around .75
inch (2 cm) a dark, bluish, iridescent
spot developed beneath the
dorsal fin. This spot grew longer with
increasing age. In this way the broad,
dark band typical of Corydoras sp.
CW 68 developed. And the yellowish-looking
post-occipital scute also
became apparent at this time.
Next time, I caught the Golden
Pencilfish out of the tank and added
an airstone to circulate the water vigorously
in one corner of the aquarium.
Two days later I was able to
watch the Corydoras trio spawning.
The eggs were distributed at random
around the aquarium. Each time four
to eight eggs were transported by the
female in her pelvic-fin pouch and
attached to a substrate. A day later
the eggs looked milky. Again, there
were around 80 of them.
Even though Corydoras sp. CW
68 isn’t a miracle of color, it is still a
further new species that we haven’t
ever been able to keep in our aquariums
before.
ON THE INTERNET
www.corydorasworld.com