A tall anemone, up to 12 cm high, the slender column flaring outwards to the broad oral disc. The tentacles, up to about 100, are steeply graduated in size, the inner ones being very long in extension, stout at the base and tapering to fine points. They are perfectly retractile but rarely retracted. The column is brown often with irregular streaks of opaque white and the tentacles are brown becoming paler and whitish toward their tips. The overall brownish colouration may have a blue tint.Possibly conspecific with Aiptasia couchii
(Cocks, 1850) although this may be a distinct species (R B Williams).