Herdmania grandis

Herdmania grandis
map Distribution

Size: 20 cm

Distribution: All SA coastal and gulf waters

Habitat: Rocky and sandy areas, seagrass beds and jetty pylons

Depth: Subtidal to 10+ metres

Herdmania grandis

Along with Phallusia obesa, this large species is the most conspicuous solitary ascidian encountered in South Australia. It is found in the open on rocky surfaces, jetty pylons and other substrates, but is usually heavily encrusted. When visible, its bulbous test is pale pink and leathery, and its pink to red lined siphons are relatively long. It has no obvious pattern inside its siphons, but instead a network of blood vessels and subtle pinkish and white colour banding. Although there are a number of similar species, particularly in its family, Pyuridae, it is by far the most commonly seen by divers and is easily recognisable with experience.