Colonies form thick grey, brown to greenish sandy cushion (2-5 cm thick and 10-25 cm in diameter).
The surfaces of large elaborate colonies may be undulating or form uneven shallow lobes.
The surface is encrusted with sand and shell particles but slight depression around small central elevation on the surface of the colony suggest the presence of the common cloacal systems.
Interiorly the zooids are arranges in the outer layer (darker layer) with gelatinous translucent test, with sparse fine sand particles interiorly.
The arrangement of the zooids in circular systems and the short raised central tubular common cloacal aperture is more conspicuous in undisturbed species viewed in situ.
Branchial opening with 6 pointing lobes and atrial opening posterior of long languet with small teeth along the distal margin.
Branchial sac with 11-15 rows of stigmata with papillae on transverse vessels.
Stomach round and surface smooth.
Thorax, abdomen and posterior-abdomen constricted off each other.
Posterior abdomen sac-like contain ova and male testes follicles.
Larva incubated in upper part of the oviduct.
Larval (trunk 0.5mm long) has 3 adhesive organs with single vesicle in-between flanked by 4 ampulla on each side.
References
Millar, R. H. 1962 Further descriptions of South African ascidians56:113-221
Monniot, C.; Monniot, F.; Griffiths, C. and Schleyer, M. 2001 Ascidians of South Africa.108:1-141
Rius, M. and Teske, P. R. 2011 A revision of the Pyura stolonifera species complex (Tunicata, Ascidiacea), with a description of a new species from Australia2754:27-40
Sluiter, C. P. 1898 Beiträge zur Kennthiss der Fauna von Süd - Afrika. Ergebrisse einer Reise van Prof. Max Weber in Jahne 1894. II. Tunicaten von Süd - Afrika11:1-64