I saw this sculpture of a fresh water crocodile, a Johnstone's crocodile, at the Botanic Gardens. It is between two and three metres long and is displayed on a rock at the top of a waterfall in the rainforest area. It is not meant to look realistic of course, but it certainly captures the essence of the animal.
Fresh water crocs are not as dangerous as their salt water cousins and tend to be smaller. They have thinner snouts and very sharp teeth. Fresh water crocodiles prefer to live in cooler water, like in pools around waterfalls or in rivers and billabongs, but they are found in salt water sometimes.