Bathybelidae is a family of sagittoideans in the order Aphragmophora.

It consists of a single genus, Bathybelos Owre, 1973,[2] which consists of a single species, Bathybelos typhlops Owre, 1973.

[2] It is unusual for having a dorsal ganglion instead of the ventral ganglion of all other chaetognaths, alongside a neck-like structure.

These are believed to be adaptations to the deep-ocean benthic habitat of the animal.

This Chaetognatha-related article is a stub.