It is one of the best known of the Antarctic ascidians. It feeds during summer months and (like most of the benthos) has strongly seasonal reproduction, but unusually larvae are released in winter. Being almost just a ‘bag’ it has very low metabolic rates, even for Antarctic animals.
Up to 25cm in diameter and 40cm in height
Mar. Ecol. Prog. Ser. (2004) Sahade, R., Tatian, M. and G.B. Esnal.