The fish species found in the north-west NSW region have been assigned a primary habitat category to assist in identifying and locating individuals. These categories represent a range of habitats that are found within rivers, creeks, wetlands and billabongs, and may vary within the region, and are described in more detail below.

Some fish species will occur in more than one habitat type during their lifecycle, and the icon used in this guide shows the most preferred or dominant habitat category for a species. For more information about other habitats used by a fish, please read the species description.

Still and slow flowing waters Optimal habitat for shoal forming species, particularly for native species that prefer slower waters to fast flowing water.
Vegetation Aquatic and riparian vegetation provides important habitat for smaller bodied species, offering protection, shelter and a food source. Aquatic vegetation may also play an important role during breeding.
Large woody debris Large woody debris, or ‘snags’, form critical habitats by providing shelter, protection and food sources. Snags are particularly important habitat for larger fish and specialist species such as the iconic Murray cod.
Rocks Large rocks and gravel substrate provide important habitat for smaller species, offering protection from predators and shelter from fast flow. The surface of rocks and gravel substrate may also play an important role during breeding.
Pools Large and small pools provide optimal habitat primarily for solitary species. Deep pools allow fish to shelter from fast flows, and may also offer a refuge site during times of low water levels.