The inlets have a naturally low turbidity but have a high sediment trapping efficiency.

The main sea grasses found in the inlet are Ruppia megacarpa and Heterozostera tasmanica.

[citation needed] Captain Thomas Bannister and his party visited the inlet in 1831, although sealers had been based in the area since before 1826.

Both estuaries, with the tidal parts of the tributary rivers, were considered as a proposed marine park in 2006.

[5] The marine park is well established, also including the tidal zones of the Frankland, Deep and Walpole Rivers.