This is the king of
swordtails, yet it is rarely kept in any real numbers,
occasionally showing up at auctions. When it does, it will often
bring up to $100 a pair. There are 4 populations kept in the
hobby, Tomosopo, Capuchin, Rascon and Ojo Caliente, and by far
the Tomosopo is the most colorful while also being one of the largest.
The montezumae behavior is the most "Wild" of any of the
swordtails. They can be shy, often hiding in the plants, and react
to sudden or unexpected movement. However, as they become
comfortable with their environment, and their numbers increase, they will spend their time out in front
showing off at one another.
They should be kept in an aquarium of 30 gallons or larger with
adequate filtration. Moderate
aeration with some water movement
and consistent water changes
will keep this species comfortable. 10-30
young are born
approx. monthly. They generally do not
their fry, which should be
caught and raised separately. Occasional
live foods are not required for
their survival, but its inclusion in
their diet strongly supports consistent
breeding and growth.
Males constantly compete with one another, and
breeding is best with a single
dominant male and a group of females in a 15
to 20 gallon tank with a generous amount of plants, and places to hide. When
well and bothered infrequently, they can be
reasonably prolific. Their rate of maturity is similar to other
swords- sexual development around 4 mos., breeding at 6-8
For more information, of this fish, click here.
Those who have seen this fish in the wild insist that it can reach
nearly a foot long. Using up to 50 gallon tanks with just a few
individuals and lots of live food, the largest raised here were
slightly less than 6 inches long (including sword). Other
have claimed to raise them larger using larger tanks. Easily the most impressive
livebearer you can keep in a home aquarium.
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