 "Ctenochasma" is distinguished by its mouth which contained as many as 260 long, thin comb-like teeth.Adult "Ctenochasma" had a bony crest along the skull, though this is not found in juveniles.Comparisons between the scleral rings of both "Ctenochasma elegans" and "Ctenochasma taqueti" and modern birds and reptiles suggest that these taxa may have been nocturnal, and may have had activity patterns similar to modern nocturnal seabirds.