Which of the following is NOT one of the three types of freshwater communities?

Freshwater communities are characterized by ecosystems that have low salt concentration, and they are primarily categorized into three main types: flowing water, standing water, and wetlands. Flowing water communities include rivers and streams where water continuously moves, while standing water refers to lakes and ponds where water is largely still. Wetlands are areas where water covers the soil for part of the year and include swamps and marshes, providing unique habitats for various species.

Marine water, on the other hand, refers to saltwater environments such as oceans and seas, which fall outside the category of freshwater ecosystems. Since marine water is characterized by its high salinity and different ecological dynamics from freshwater systems, it is not considered one of the three types of freshwater communities.