While A. senhousia has been confirmed previously in South Australia it has not been detected in subsequent surveillance in 2010-2011 and 2015-2016 (Wiltshire et al., 2010; Wiltshire and Deveney, 2011; Wiltshire et al 2017). 

Arcuatula senhousia is a small mussel with a maximum length of around 30 mm. It is normally found in muddy estuaries and bays, burrowing into the mud or sitting on top of it. Byssal threads (the 'beard' of the mussel) are used to construct a cocoon which protects the shell. These may tangle with other cocoons and form a network in which sediment collects. Using its byssus individuals may cluster together, occasionally forming dense mats on the substrate.

Males and females are not readily differentiated by the naked eye (IUCN Center for Mediterranean Cooperation).  

Arcuatula senhousia is patchily widespread across southern Australia.

The mussels have a smooth, thin shell which is olive green to brown in colour, with dark radial lines or zigzag markings. The cocoon of byssal threads is not always present.

First recorded in Australia in the Swan Estuary, Western Australia in 1980s, although this population became extinct after a rainfall event and toxic cyanobacterial bloom in 2000 (McDonald ansd Wells, 2010).