Helcogramma nesion is a species of triplefin blenny in the genus Helcogramma.

[2] It was described by Jeffrey T. Williams and Jeffrey C. Howe in 2003.

[3] 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.

[1]