Modiolus albicostus is a species of "horse mussel", a marine bivalve mollusc in the family Mytilidae, the mussels.
Description The shell of an adult Modiolus albicostus can be as long as .
Distribution This species is widespread from Indochina to Southwestern Australia.
References Biolib Discover Life Encyclopaedia of Life WoRMS Worldwide Mollusc Species Data Base