Calliactis parasitica (Couch, 1842)
parasitic or, hermit crab anemone

In less than 1m depth of water, Santa Marina, Salina.

Location:
Found in less than 1m of water behind sea defence rock barriers, Santa marina, Salina.

Links:
World Register of Marine Species
http://www.marinespecies.org/aphia.php?p=taxdetails&id=100946
SeaLifeBase
https://www.sealifebase.ca/summary/Calliactis-parasitica.html
Global Biodiversity Information Facility (GBIF)
https://www.gbif.org/species/2257373
iNaturalist
https://uk.inaturalist.org/taxa/358550-Calliactis-parasitica​

International Union for Conservation of Nature (IUCN) status:
Not Evaluated on the IUCN Red List (Global)
Evaluated as LC (Least Concern) on the IUCN Red List (Mediterranean)
​Evaluated as DD (Data Deficient) on the IUCN (Italy) Lista Rossa