Here's why:

* Fresh or salt water: Marshes can be freshwater (like a bog) or saltwater (like a tidal marsh).

* Reeds and variety of plant life: Marshes are characterized by their abundance of emergent vegetation, including reeds, grasses, cattails, and other plants adapted to wet conditions.

Other terms that might fit your description, depending on the specific features, include:

* Swamp: A wetland dominated by trees, often with a thick layer of decaying vegetation.

* Bog: A type of freshwater wetland characterized by acidic water and peat accumulation.

* Fen: A type of freshwater wetland that receives water from groundwater, often with a rich diversity of plant life.

Let me know if you have more specific details about the wetland you're describing, and I can help narrow it down further.