Seafan

    Loading the index

    Emergencies
    On this page

    Anemone

    Ritteri anemone

    Radianthus magnifica (formerly Heteractis magnifica)

    Also sold as Magnificent anemone

    Ritteri anemone (Radianthus magnifica)
    Photo: Nick Hobgood, CC BY-SA 3.0, via Wikimedia Commons
    Type
    Anemone
    Care level
    Expert only
    Light
    250 to 450 PAR (high)
    Flow
    High
    With neighbours
    Stings neighbours

    Safety: handling ritteri anemone

    How do you care for ritteri anemone?

    Placement

    Exposed high rock

    Flow

    Strong

    Feeding

    Regular meaty foods

    Growth

    Large

    Water quality

    Excellent water quality; many arrive in poor condition typical, check

    How much light does it need?

    Sources put it at about 250 to 450 PAR, measured where the coral sits. No figure was published for this coral itself, so this is the usual range for its group. Start a new coral at the low end and raise it over weeks.

    Called the most light-hungry anemone in forums. typical, check

    Which neighbours are safe?

    Aggressive typical, check

    Large

    Fish

    Fish known to nip this group of corals, or small enough to be caught by it.

    Take care (1)

    Other corals

    This coral stings. Give these neighbours space.

    Take care (44)

    • ZoanthidsRitteri anemone stings neighbours; keep the zoanthids out of reach.
    • PalythoaRitteri anemone stings neighbours; keep the palythoa out of reach.
    • Mushroom coralRitteri anemone stings neighbours; keep the mushroom coral out of reach.
    • Hairy mushroomRitteri anemone stings neighbours; keep the hairy mushroom out of reach.
    • Florida ricordeaRitteri anemone stings neighbours; keep the florida ricordea out of reach.
    • Yuma ricordeaRitteri anemone stings neighbours; keep the yuma ricordea out of reach.
    • Toadstool leatherRitteri anemone stings neighbours; keep the toadstool leather out of reach.
    • Finger leatherRitteri anemone stings neighbours; keep the finger leather out of reach.
    • XeniaRitteri anemone stings neighbours; keep the xenia out of reach.
    • Pulsing xeniaRitteri anemone stings neighbours; keep the pulsing xenia out of reach.
    • Waving hand coralRitteri anemone stings neighbours; keep the waving hand coral out of reach.
    • Green star polypsRitteri anemone stings neighbours; keep the green star polyps out of reach.
    • Clove polypsRitteri anemone stings neighbours; keep the clove polyps out of reach.
    • Kenya treeRitteri anemone stings neighbours; keep the kenya tree out of reach.
    • Hammer coralRitteri anemone stings neighbours; keep the hammer coral out of reach. Hammer coral stings neighbours up to about 15 cm away at night; keep the ritteri anemone out of reach.
    • Frogspawn coralRitteri anemone stings neighbours; keep the frogspawn coral out of reach. Frogspawn coral stings neighbours; keep the ritteri anemone out of reach.
    • Torch coralRitteri anemone stings neighbours; keep the torch coral out of reach. Torch coral stings neighbours; keep the ritteri anemone out of reach.
    • Duncan coralRitteri anemone stings neighbours; keep the duncan coral out of reach.
    • AcanRitteri anemone stings neighbours; keep the acan out of reach.
    • FaviaRitteri anemone stings neighbours; keep the favia out of reach.
    • FavitesRitteri anemone stings neighbours; keep the favites out of reach.
    • Chalice coralRitteri anemone stings neighbours; keep the chalice coral out of reach.
    • BlastomussaRitteri anemone stings neighbours; keep the blastomussa out of reach.
    • Candy cane coralRitteri anemone stings neighbours; keep the candy cane coral out of reach.
    • Bubble coralRitteri anemone stings neighbours; keep the bubble coral out of reach.
    • GonioporaRitteri anemone stings neighbours; keep the goniopora out of reach.
    • AlveoporaRitteri anemone stings neighbours; keep the alveopora out of reach.
    • Open brain coralRitteri anemone stings neighbours; keep the open brain coral out of reach.
    • LoboRitteri anemone stings neighbours; keep the lobo out of reach.
    • GalaxeaRitteri anemone stings neighbours; keep the galaxea out of reach. Galaxea stings neighbours up to about 15 cm away at night; keep the ritteri anemone out of reach.
    • Scroll coralRitteri anemone stings neighbours; keep the scroll coral out of reach.
    • Montipora capricornisRitteri anemone stings neighbours; keep the montipora capricornis out of reach.
    • Montipora digitataRitteri anemone stings neighbours; keep the montipora digitata out of reach.
    • AcroporaRitteri anemone stings neighbours; keep the acropora out of reach.
    • Acropora milleporaRitteri anemone stings neighbours; keep the acropora millepora out of reach.
    • PocilloporaRitteri anemone stings neighbours; keep the pocillopora out of reach.
    • StylophoraRitteri anemone stings neighbours; keep the stylophora out of reach.
    • Birdsnest coralRitteri anemone stings neighbours; keep the birdsnest coral out of reach.
    • Horn coralRitteri anemone stings neighbours; keep the horn coral out of reach. Horn coral stings neighbours; keep the ritteri anemone out of reach.
    • Fire coral (not Acropora millepora)Ritteri anemone stings neighbours; keep the fire coral (not Acropora millepora) out of reach. Fire coral (not Acropora millepora) stings neighbours; keep the ritteri anemone out of reach.
    • Bubble tip anemoneRitteri anemone stings neighbours; keep the bubble tip anemone out of reach. Bubble tip anemone stings neighbours; keep the ritteri anemone out of reach.
    • Rock flower anemoneRitteri anemone stings neighbours; keep the rock flower anemone out of reach.
    • Mini maxiRitteri anemone stings neighbours; keep the mini maxi out of reach. Mini maxi stings neighbours; keep the ritteri anemone out of reach.
    • Carpet anemones (Haddon's, giant)Ritteri anemone stings neighbours; keep the carpet anemones (Haddon's, giant) out of reach. Carpet anemones (Haddon's, giant) stings neighbours; keep the ritteri anemone out of reach.

    Invertebrates

    Invertebrates that may nip corals when hungry.

    Take care (3)

    These checks follow the reasons fish and invertebrates clash: same species or genus, similar shape, mouth size, temperament, food, burrows, tank size and the order they are added. Individual animals differ; every source agrees on that.

    Pests, dips and quarantine

    None specific

    No coral dips

    No dip reliably kills pest eggs, so a dip lowers the risk rather than removing it. Inspect new frags with a torch after lights out, including the underside and the plug.

    Sources

    1. LiveAquaria ritteri anemone listing (Expert Only)Read 21 October 2026, search summary only.
    2. Reef Central H. magnifica threadsRead 21 October 2026, search summary only.
    3. Wikipedia API title redirects (Euphyllia ancora to Fimbriaphyllia ancora, Heteractis magnifica to Radianthus magnifica)Read 21 October 2026, read in full.

    Last checked . How we check

    Found a mistake? Tell us how to fix it.

    Bubble tip anemone

    Entacmaea quadricolor

    Care
    Intermediate
    Light
    High
    Flow
    Medium
    Neighbours
    Stings neighbours

    Photo Nick Hobgood, CC BY-SA 3.0

    Rock flower anemone

    Phymanthus crenatus (and others)

    Care
    Beginner
    Light
    Medium
    Flow
    Low
    Neighbours
    Peaceful

    Photo RevolverOcelot, CC BY-SA 3.0

    Mini maxi

    Stichodactyla tapetum

    Care
    Intermediate
    Light
    High
    Flow
    Medium
    Neighbours
    Stings neighbours

    Photo Chaloklum Diving, CC BY 3.0