''Polyipnus elongatus'' is a species of ray-finned fish in the family Sternoptychidae. It can be found in deep water in the southwestern Pacific Ocean around Australia, at depths down to about .

Status

''Polyipnus elongatus'' is a common benthopelagic species within its known range, where it is likely to be restricted by lack of data, and faces no particular threats. For these reasons, the International Union for Conservation of Nature has assessed its conservation status as being of " least concern".

References

{{Taxonbar, from=Q2554204 Sternoptychidae Fish described in 1979