This is the largest species of bully and it can reach more than 25 cm (10 in) in length, but most are 12–15 cm (4.7–5.9 in).[1][5] Adults are generally found near the coast in freshwater, tidal or estuarine habitats.[1][5] The breeding behavior is poorly known, but the species is considered diadromous and it is suspected that the larvae spend time in the sea.[1][5]
It is very similar to the common bully (which can reach up to 15 cm or 5.9 in), but it has six dorsal spines, where the common bully usually has seven.[5]