Martensia fragilis

{{Short description|Species of alga}}

{{Speciesbox

| genus = Martensia

| species = fragilis

| authority = Harvey, 1854

}}

Martensia fragilis is a species of red algae.Guiry, M.D. & Guiry, G.M. 2012. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 31 October 2012{{Cite web |title=WoRMS - World Register of Marine Species - Martensia fragilis Harvey, 1854 |url=https://www.marinespecies.org/aphia.php?p=taxdetails&id=371601 |access-date=2025-05-05 |website=www.marinespecies.org}}