Xiphophorus montezumae

This is the Montezuma swordtail. Most swordtails - the specimen illustrated here is a feral variety - have shorter "swords" than X. helleri. They are rarely sold commercially. Size: 5 cm.

• Cynolebias nigripinnis
• Epalzeorhynchus kallopterus
• Betta splendens
• Hyphessobrycon peruvianus
• Hemigrammus hyanuary