Mastacembelus ophidium

{{Short description|Species of fish}}

{{Speciesbox

| image =

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Bigirimana, C. |author2=Vreven, E. |date=2006 |title=Mastacembelus ophidium |volume=2006 |page=e.T60392A12349876 |doi=10.2305/IUCN.UK.2006.RLTS.T60392A12349876.en |access-date=16 November 2021}}

| taxon = Mastacembelus ophidium

| authority = Günther, 1893

| synonyms = *Afromastacembelus ophidium (Günther, 1894)

• Caecomastacembelus ophidium (Günther, 1894)

| synonyms_ref = {{Fishbase|Mastacembelus|ophidium|month=August|year=2019}}

}}

Mastacembelus ophidium is a species of fish in the family Mastacembelidae. It is endemic to Lake Tanganyika where it is a secretive fish, hiding in the sediment or between rocks on sandy shores.