Helcogramma billi
{{Short description|Species of fish}}
{{Speciesbox
| status = LC
| status_system = IUCN3.1
| taxon = Helcogramma billi
| authority = P. E. Hadley Hansen, 1986
| synonyms =
}}
Helcogramma billi is a species of triplefin blenny in the genus Helcogramma.{{Fishbase|Helcogramma|billi|month=April|year=2019}} It was described by Patricia E. Hadley Hansen in 1986,{{Cof record|spid=7869|title=Helcogramma billi|access-date=25 May 2019}} and the specific name honours the American ichthyologist Bill Smith-Vaniz, who collected the types Hadley Hansen examined when describing the species.{{cite web | url = http://www.etyfish.org/blenniiformes1/ | title = Order BLENNIIFORMES: Families TRIPTERYGIIDAE and DACTYLOSCOPIDAE | work = The ETYFish Project Fish Name Etymology Database | author1 = Christopher Scharpf | author2 = Kenneth J. Lazara | publisher = Christopher Scharpf and Kenneth J. Lazara | accessdate = 25 May 2019 | date = 29 January 2019}} This species is common on rock surfaces and beneath ledges in waters down to {{convert|10|m|ft}} in depth around the coasts of Sri Lanka.