Round Sand Eel
Bascanichthys cylindricus
- Least concern
- Card rarity: Common
- Fish

The Round sand-eel is an eel in the family Ophichthidae. It was described by Seth Eugene Meek and Samuel Frederick Hildebrand in 1923. It reaches a maximum length of around 88 cm. It is distributed throughout the Eastern Central Pacific; inhabiting shallow, sandy bottoms.
Classification
- Class
- Actinopterygii
- Order
- Anguilliformes
- Family
- Ophichthidae
- Genus
- Bascanichthys