The sword on this species is the longest of any of the swordtail species & can exceed 5".

Member of the group comprising alvarezi, birchmanni, continens, cortezi, helleri, malinche, montezumae, multilineatus, nezahualcoyotl, nigrensis, pygmaeus & signum.

Populations

• El Quince, Mexico, Rio Frio.
• Rascon
• Tamasopo

• Blue / green monty. This form was cultivated over an 8 year period in the USA from its first introduction. According to Al.Klopman when grown in natural daylight they get a significant area of bright red along the lateral line on each flank. The blue/green refers to the iridescence on the body.
• Ivory Monty. This form cultivated in the USA for 7 years since it's collection from the wild in 1998 under a waterfall in the Rio Gallinas area of southern Mexico.
  This form also referred to as the 'mottled monty'
• Rascon. Reportedly the most white coloured of all populations of montezumae. They have deep bodies which are bright white with black speckles..

Reported by some breeders as being a seasonal breeder.