> [!summary]- Classification
**Kingdom**:: Animals
**Phylum**:: Porifera
**Subphylum**::
**Superclass**::
**Class**:: Demospongiae
**Subclass**:: Heteroscleromorphia
**Superorder**::
**Order**:: Haplosclerida
**Suborder**::
**Superfamily**::
**Family**:: Petrosiidae
**Subfamily**::
**Genus**:: Petrosia
**Species**:: P. ficiformis
**Vernacular**:: Stony sponge
## Photos
*[122 - 2023-05-14 - Aspo faro - Epidaurus - Greece](122%20-%202023-05-14%20-%20Aspo%20faro%20-%20Epidaurus%20-%20Greece.md) - With a bivalvia's shell that I can't identify, [Spongia officinalis - Greek bathing sponge](Spongia%20officinalis%20-%20Greek%20bathing%20sponge.md) on its right, [Spirastrella cunctatrix](Spirastrella%20cunctatrix%20-%20Orange%20encrusting%20sponge.md) on the left. The shells seems come from the octopus burrow on the picture right side.*
## Notes
This sponges is the favorite meal of the [Peltodoris atromaculata - Dotted sea-slug](Peltodoris%20atromaculata%20-%20Dotted%20sea-slug.md)
## References
- https://doris.ffessm.fr/Especes/Petrosia-Petrosia-ficiformis-Eponge-pierre-113
- [Découvrir la vie sous-marine - Méditerranée - Steven Weinberg](Découvrir%20la%20vie%20sous-marine%20-%20Méditerranée%20-%20Steven%20Weinberg.md) p.135