#benthos
- Actinians — Plural form for the masculine noun 'actiniu' (in a zoological context, variant for actinia/sea anemone) or utilized taxonomically to designate a structural group of marine coelenterates from the Anthozoa class. These benthic polypoid organisms possess a fleshy body and a radiant crown of peri-oral tentacles equipped with cnidocytes, being widespread on sea and ocean floors where they often live solitarily fixed to rocks.