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Home  /  Anemone Range  /  Magnifica Anemone
Magnifica Anemone (Heteractis magnifica)

Magnifica Anemone

Heteractis magnifica
Advanced onlyClownfish hostVery high light
Family
Stichodactylidae
Care level
Advanced
Lighting
High
Flow
High
Placement
Top third / high light
PAR
250–400
Temperament
Aggressive
Growth form
Single large polyp with long, flowing tentacles and a brightly coloured column
Max size
Commonly 30–50 cm across expanded; larger in ideal conditions
Colour
Long tentacles, often with magenta or green tips, over a vivid blue, green, red or magenta column
Diet
Photosynthetic + regular supplemental feeding
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Overview

The Magnifica, or Ritteri anemone, is one of the most beautiful host anemones — long, flowing tentacles above a brilliantly coloured column that can be electric blue, green, red or magenta. In the wild it lives on exposed reef tops in intense light and strong current, often perched prominently on a coral head or pillar with its column fully on display. It's a spectacular natural host for several clownfish species.

Honesty matters here: Heteractis magnifica is a demanding, advanced-only anemone with a poor track record in captivity. It needs very intense lighting, strong flow, pristine and stable water, and a large, well-established tank, and even experienced keepers lose them. It's notorious for wandering — often relentlessly — until it finds conditions it likes, and a Magnifica on the move is at constant risk of reaching a powerhead. We class it firmly as advanced and don't recommend it for anyone who hasn't kept easier anemones successfully. Anyone wanting a first host anemone should choose a Bubble Tip instead.

As one-of-one WYSIWYG livestock, the exact anemone you see is the one you take home. Because this species is so demanding and so often lost, we'd rather set honest expectations than see it fail.

Placement & neighbours

Treat the Magnifica as aggressive. It has long tentacles with a potent sting used to capture prey, and it will sting any coral it can reach and can capture fish that contact it. Given its large size, its tendency to wander, and the reach of its tentacles, it's best given its own tank or a large system where nothing valuable can come into contact with it, and where corals aren't sited anywhere near where it settles.

Like all anemones it chooses its own position and is highly mobile — more so than most. In the wild it attaches its foot high on exposed rock or a pillar with strong light and flow, so provide solid elevated rockwork and expect it to hunt for the brightest, highest-flow spot. Guard every pump intake and overflow before adding one, because a wandering Magnifica reaching a powerhead is one of the most common ways it's lost, and a shredded anemone will foul the tank fast.

Health & acclimation

Selection and conditions are everything with this species. Choose a specimen with a firmly attached foot, sticky tentacles, an intact and closed mouth, good colour, and no damage to the column — reject any that are detached, deflated, gaping, or that have torn feet, as these rarely recover. Acclimate very slowly by drip, and only ever add one to a large, mature, pristine, stable tank. The critical warning signs are a persistently gaping mouth, deflation, expelling of brown material, loss of tentacle stickiness, a damaged column, or constant wandering — any of these mean the animal is failing, and a dying Magnifica releases a large amount of waste that can crash a tank rapidly. Remove a clearly dying specimen without delay, and note that column damage in particular often proves fatal.

Frequently asked questions

Is the Magnifica suitable for beginners?
No — it's one of the more difficult host anemones, with a poor survival record even in experienced hands. It needs very intense light, strong flow, pristine stable water, and a large mature tank. We don't recommend it unless you've kept easier anemones successfully; a Bubble Tip is a far safer first host anemone.
Why does the Magnifica wander so much?
It's naturally one of the most mobile anemones, and it moves in search of the intense light and strong flow it needs. Persistent wandering usually means your tank isn't meeting those needs. Providing high light, strong flow and elevated rockwork encourages it to settle — but until it does, it's at real risk of reaching a powerhead.
How much light does it need?
A great deal — roughly 250–400 PAR from strong, quality reef lighting, reflecting its natural home on exposed, brightly lit reef tops. Inadequate light is a major cause of decline and wandering. Increase intensity gradually when you add it to avoid bleaching, and pair it with strong flow and regular feeding.
How do I protect my tank and my other livestock?
Guard every pump intake and overflow before adding one, since a wandering Magnifica reaching a powerhead is a common way it's lost and can foul the tank. Its long tentacles carry a potent sting that will hit corals and can catch fish, so keep valuable corals well away from where it settles, or give it its own tank.
Will it host my clownfish?
Often, yes — it's a natural host for several clownfish species and hosting can be spectacular. But a clownfish moving in doesn't make the anemone healthy or easier to keep. Its survival depends on light, flow, water quality and stability, so don't let successful hosting lull you into thinking it's thriving.
Why do Magnificas so often die despite good care?
They're highly specialised for exposed, high-light, high-flow reef tops, and captive systems struggle to match that. Many also arrive stressed from collection and shipping, and column damage or an unsettled, constantly wandering anemone often precedes loss. Careful selection, intense light, strong flow and a large stable tank improve the odds, but this species remains unpredictable, which is why it's for experienced keepers only.

Care guidance is drawn from our own experience — every coral is an individual, so treat it as a starting point, not a guarantee. Not sure if a coral suits your system? Come ask us in store.