On a slow moving tributary of the Murray/Darling River System - about 50km north of Mildura - you hook up what feels like a big Murray cod. It's proving to be a big effort to bring the fish to shore. Write about what happens over the next hour.

About 1.5km off the shoreline at Forster on the NSW north coast, you're snorkelling in 15-metre deep ocean waters. With lungs full of new air you start down, and beside a rocky outcrop seven metres below the surface you come face to face with a grey nurse shark. What happens next?

You're a Fisheries Officer patrolling the Gwydir River somewhere between Moree and Walgett in a 3.6 metre open-top runabout. In a deep pool downstream of major rapids you spot an illegal net. Write about what you find in the net and what action you take.