Kalmar “actinian” tana nufin wani nau’in dabbar ruwa, musamman ma memba na ajin Anthozoa, wanda ya haɗa da anemones na teku da murjani. Actinians suna da siffar siffar fure-fure da yawa, waɗanda suke amfani da su don kama abinci da kare kansu daga mafarauta. Kalmar “actinian” ta fito ne daga kalmar Helenanci “aktis,” ma’ana “ray” ko “beam,” dangane da tantunan da ke haskakawa daga tsakiyar faifan dabba.