Like most cold-blooded creatures, fish are less active in the winter, as their metabolisms dips, and their need for oxygen and food decreases. While many fish will wait out the cold months, others at the extreme end of their temperature tolerance can find these conditions much more stressful. For example, survival of larval Murray Cod significantly decreased following water release from cold impoundments in Victoria. Juvenile fish also face the risk of predation, particularly when they are less active over winter.  The risk of predation however, can be dampened by the availability of shelter. The quantity and quality of habitat has been shown to significantly influence the survival of juvenile fish, as they seek shelter over winter. There is however, a significant gap in our understanding of fish habitat preference and behaviour in lakes over winter. I propose a project using remotely operated vehicles (ROVs) to describe behaviour, habitat use, and location of freshwater fish in lakes across Victoria over winter. This project will fill a gap in our fundamental understanding of what fish do, and where fish go, when the temperatures drop, and provide valuable information for habitat restoration management in Victorian lakes.