The Round sand-eel (Bascanichthys cylindricus) is an eel in the family Ophichthidae (worm/snake eels).

[1] 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.

This Ophichthidae article is a stub.