Common Name-The Blue Swordtail
Water Conditions- Water movement,
water changes, Temp. 70-80,
Behavior- A Peaceful community fish.
Breeding- 10-50 young
Size- 4-5 inches
This fish has tremendous color, and with recent breeding
efforts has become a large fish with almost painted-on
red stripes, all with a reflective blue sheen. This fish has
always done well, but has recently come to show good
size and color. A recent picture taken of a current adult
male shows the breathtaking color of this fish.
The red continues to intensify and broaden as the males
mature. A small flashlight kept near the tank will bring out
the blue in the caudal peduncle when observing them. Not as
large as the X. mayae, they can still be a large sword,
with larger males coming close to or surpassing 4 inches. The
females also become fairly large, particularly when
gravid when a large gravid spot can be seen prominently as
they are about to drop their fry. They should be kept in
at least a 15 gallon aquarium for room to swim around and
grow to their full size. Like most swords, they are fairly
active, and the males routinely chase one another for
dominance, particularly when being fed. This is not a rare or
endangered fish in the wild, but is certainly as colorful and
dramatic in its wild form as any carefully developed
domestic line, yet rarely seen in the hobby.
This fish truly does well in a standard swordtail setup of
some water movement and active aeration. They do fine on
baby brine shrimp- even the adults- but do particularly well
when fed worms, such as blackworms or earthworms.
To keep the water clean, this is a species that truly
benefits from a bare bottom tank with a thin layer of gravel,
or airstone providing some water movement, with consistent weekly water
Not the least bit shy, they are always out in the open, and
the amount of light offered seems to go unnoticed.
Females become large with a dark gravid spot as they are
about to give birth, and should be moved to their own
5 or 10 gallon aquarium to drop their fry. The fry are small
for a swordtail, but can take baby brine shrimp
immediately and will grow quickly.
See other Care Guides