This project involves developing a rapid assessment of the fish fauna of freshwater habitats in the Jardine River catchment and nearby streams. A mix of survey methods including netting and observational approaches are used. Baited underwater cameras in dangerous waters (i.e. crocodiles) and snorkelling in small waterways provides a means of rapidly assessing the composition of the fish fauna at a range of sites. Netting is also used to verify records of species and to collect species unlikely to be seen by the visual techniques (e.g. nocturnal species). Specimens or tissue samples are occasionally retained if the identity of a species is unclear. The project serves to document the diversity of native species and to test of the presence of pest species.