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Invertebrates

Magnificent sea anemone

Heteractis magnifica

Sea anemone sheltering clownfish

Clownfish disappear among the tentacles of a large anemone. Their shelter is a living predator, anchored where light and moving water meet.

Local names
Pa’i Pa’i Pu’a

About this species

The magnificent sea anemone can shelter groups of clownfish; the guide records groups of up to a dozen. Chemical cues help fish recognise their host. Finger-like tentacles can reach about 8 cm, with colours described in the source from orange to salmon.

Stinging cells help capture prey and can irritate skin. The anemone fixes itself to hard surfaces in bright, well-flushed water, with the guide giving a depth range of roughly 5–20 m. Alongside hunting, it receives food produced by symbiotic algae in its tissues.

The anemone, like coral, lives in symbiosis with zooxanthellae who photosynthesize to provide it food.