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.

• Epalzeorhynchus kallopterus
• Colisa labiosa
• Helostoma temmincki
• Aphyosemion australe
• Geophagus brasiliensis