The open-water habitat in rivers and streams is the body of water flowing through the channel. The characteristics of the water can vary considerably in relation to the morphology of the channel. Rivers and streams in Nova Scotia are not deep enough to create layering in the water column. Populations of consumer organisms are also low, but riffle areas provide valuable habitat for juvenile trout and salmon.
Pools are important resting areas for several fish species.
A number of bird and mammal species are also present.