Acarnus erithacus

{{Short description|Species of sponge}}

{{Speciesbox

| image = Acarnus erithacus.jpg

| image_alt =

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| genus = Acarnus

| species = erithacus

| authority = de Laubenfels, 1927

}}

Acarnus erithacus is a species of sponge of the genus Acarnus.{{cite web |title=Integrated Taxonomic Information System - Acarnus erithacus - de Laubenfels, 1927 |url=https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=678097#null |publisher=Integrated Taxonomic Information System |access-date=29 September 2021}} It was described by de Laubenfels in 1927.{{cite web |title=Acarnus erithacus (de Laubenfels, 1927} |url=http://www.marinespecies.org/aphia.php?p=taxdetails&id=167343 |website=World Register of Marine Species |access-date=29 September 2021}}