Peachia cylindrica is a large species of sea anemone in the family Haloclavidae. It is normally found burrowed into soft substrates, the only visible part of the animal being the oral disc and tentacles which usually lie flat on the sand. It is the type species of the genus Peachia.

Peachia cylindrica (Reid, 1848) Description: This burrowing sea anemone has an elongated column, which is sausage-shaped, with a rounded base, sometimes with adherent sand grains. There are 12 tentacles, long in extension (only when buried). From one angle of the mouth a small lobed projection (conchula) arises.

Unlike many other nonattached burrowing anemones Peachia cylindrica is rather robust species and may reach 30 cm long and 2.5cm diameter. Typically, only a disc with 12 characteristically coloured tentacles is visible on surface, while the whole body is buried deeply into the substratum.