Calliactis

{{Short description|Genus of sea anemones}}

{{Automatic taxobox

| image = Dardanus pedunculatus (Hermit crab).jpg

| image_caption = Hermit crab (Dardanus pedunculatus) with Calliactis species attached to its shell.

| taxon = Calliactis

| authority = Verrill, 1869

| subdivision_ranks = Species

| subdivision = See text

| synonyms = * Calliactus

}}

File:Calliactis and Dardanus 001.JPG on the hermit crab Dardanus calidus]]

Calliactis is a genus of sea anemones. Species in this genus are mutually symbiotic with hermit crabs. The anemone gets a place to live and discarded scraps of the crab's food in exchange for its help in defending the crab.{{cite journal |author=Gusmão LC, Daly M |title=Evolution of sea anemones (Cnidaria: Actiniaria: Hormathiidae) symbiotic with hermit crabs |journal=Molecular Phylogenetics and Evolution |volume=56 |issue=3 |pages=868–77 | date=September 2010 |pmid=20457262 |doi=10.1016/j.ympev.2010.05.001}}