Mesacmaea

{{Short description|Genus of sea anemones}}

{{Automatic taxobox

| image = Mesacmaea mitchelli 62878461.jpg

| image_caption = Mesacmaea mitchelli

| taxon = Mesacmaea

| authority = Andres, 1883 [http://www.marinespecies.org/aphia.php?p=taxdetails&id=100748 Mesacmaea - Andres, 1883] World Register of Marine Species. Retrieved 26 October 2018.

| subdivision_ranks = Species

| subdivision = {{center|See text}}

}}

Mesacmaea is a genus of sea anemone in the family Haloclavidae. Members of this genus typically burrow into soft substrates. The only part of the animal that is normally visible is the oral disc and tentacles which lie flat on the sand in a star shape.[http://species-identification.org/species.php?species_group=anthozoa&menuentry=groepen&id=23&tab=beschrijving Family Haloclavidae] Marine Species Identification Portal. Retrieved 26 October 2018.