Metridium senile, or frilled anemone, is a species of sea anemone in the family Metridiidae. As a member of the genus Metridium, it is a type of plumose anemone and is found in the seas off north-western Europe and both the east and west coasts of North America.

Metridium senile. Retrieved May, 08 2021, from en.wikipedia.org/wiki/Metridium_senile.