he "Flagtail Cory, I would say is the most strikingly marked Corydoras of all. Their tail is the first thing that catches the eye, five or six bold black horizontal stripes on a white background. Three distinct stripes in the middle of the tail appear to run into the body pattern, breaking up into large spots by mid-body. Their main body, which is a silver/white color, is patterned in what looks like broken stripes along the back and lower sides. The dorsal fin shows a couple of faint black stripes, while all the other fins show just a hint of black in them.
78 degrees Fahrenheit
The robineae laid their
eggs during mid to late afternoon. About half of the two
hundred eggs were placed on the bare glass bottom of the
tank, in the open, along the left side and closer to the
back wall. I would guess that about sixty eggs were scattered
among the roots of a Java Fern and an Anubias plant. The
remaining forty or so were deposited in a couple of small,
tight groups on the tank sides, just about three inches
off the bottom. The eggs on the floor were also laid close
together in smaller groups and somewhat in a row. Eggs
measure at two millimeter and are sort of white in color.
I thought at first that none of the eggs were good and
they had begun to fungus already! As to not have all
my eggs in one basket I decided to move the plants
that were full of eggs into a bare two-gallon tank with
an air stone at moderate airflow. With my fingers I rolled
off about fifteen eggs and placed them into another tank
that was already set up for hatching some other Cory species.
I shut off the return water from the central system in
the original spawning tank and lowered the water level
to about five inches.
The eggs began to hatch late on the third day, spotting a single wriggler on a tank bottom. The remaining eggs hatched on the afternoon of the fourth day. Most of the eggs in the original spawning tank had fungused by the fourth day and only six fry hatched. The eggs that were attached to the plants that had been moved produced seven fry and the eggs I moved with my fingers resulted in nothing. Within about two days after hatching, I began added a small amount of Microworms every couple of days to both fry tanks. In the two gallon I did a cup or two water change every other day & left the other, larger, tank alone. Within a week I began adding small amounts of newly hatched baby brine shrimp into their diet and shortly after that, tiny amounts of assorted crushed flakes were given. The fry in the two-gallon tank grew slightly faster than the others, Im sure due to the water changes. The fry in the small tank were moved into a half filled, ten-gallon tank on day eighteen. (With smaller fry I like to keep the water level low to reduce the water pressure on them.) At twenty-two days their total length reached three quarters of an inch and at thirty-five days a solid one inch. This is rapid growth for a Cory, probably because of the small number of them getting some specialized attention from me! My hopes are to raise these fry and set them up in a breeding colony, Im thinking that tank-raised, F1 fish, will be easier to spawn than wild caught fish.