Helcogramma nesion
{{Short description|Species of fish}}
{{Speciesbox
| status = LC
| status_system = IUCN3.1
| taxon = Helcogramma nesion
| authority = Williams & Howe, 2003
| synonyms =
}}
Helcogramma nesion is a species of triplefin blenny in the genus Helcogramma.{{Fishbase|Helcogramma|nesion|month=April|year=2019}} It was described by Jeffrey T. Williams and Jeffrey C. Howe in 2003.{{Cof record|spid=67619|title = Helcogramma nesion|access-date=26 May 2019}} This species is found in the western Pacific Ocean where it is endemic to Japan, it is restricted to the Izu Islands, Ogasawara Islands and to the island of Okino-shima which is at the south-western tip of Shikoku.