Meroo and Termeil Lakes are listed in the National Directory of Important Australian Wetlands and stand out for their abundance and diversity of mammals and frogs. The park also has at least 12 threatened wildlife species, including significant populations of the nationally endangered green and golden bell frog. As you explore the coastline keep a lookout to spot dolphins and whales off the coast. Thee's also excellent opportunities for birdwatching at Meroo. You'll see ducks, swans, pelicans, honeyeaters, superb blue wrens and pied oystercatchers. You might also spot sea eagles or an osprey soaring overhead. And if you're really lucky, you might even see a pair of hooded plover. There are less than 25 pairs known to occur in NSW, and the Meroo, Termeil and Willinga Lake entrances are prime breeding habitats for this vulnerable species.

The coastal lakes, foreshores and wetlands you'll find in Meroo are outstanding examples of pristine natural environments. Only 10% of NSW estuaries remain in such a natural condition. This unspoilt landscape supports endangered ecological communities like the swamp oak floodplain forest and bangalay-banksia dry forest and helps to protect vulnerable plant species such as the tangled bedstraw and leafless tongue orchid.

Meroo National Park forms part of the traditional lands of the Budawang and Murramarang tribes, who are part of the Dhurga language group. Meroo Lake has important spiritual significance for local Aboriginal groups because, along with other lakes in the region, it is connected to the Pigeon House Didthul creation stories that connect them with their country and ancestor spirits. The park is rich with archaeological sites including shell middens, open campsites, artefact scatters, stone arrangements, rock shelters and a burial site.