Yellow Belly
Girardinus falcatus
- Least concern
- Card rarity: Common
- Fish

Girardinus falcatus, the goldbelly topminnow, is a species of Cuban tropical fish. Another common name of the species is yellow belly. The fish is pale gold and has a bright blue iris. Males are smaller than females and constantly mate. Females can grow to 8.5 cm (3.3 in) standard length, males to less than half of that.
Classification
- Class
- Actinopterygii
- Order
- Cyprinodontiformes
- Family
- Poeciliidae
- Genus
- Girardinus