Posidonia australis

Common card · No. 405103

Posidonia australis, also known as strapweed, tapeweed, ribbonweed or fibre-ball weed, is a species of seagrass that occurs in the southern coastal waters of Australia. It grows subtidally to a depth of 15 m (49 ft), forming large meadows important to environmental conservation. Balls of resistant fibre from decomposing detritus from the foliage are found along nearby shore-lines. In 2022, a single stand in Shark Bay was reported by scientists to be the largest plant in the world, extending around 180 km (110 miles) and covering an area of about 200 km2 (49,000 acres) of seafloor.

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