Here are some examples:
* Algae: These are simple, non-flowering plants that can be found in both freshwater and saltwater environments.
* Water lilies: These beautiful flowering plants have large, round leaves that float on the surface of the water.
* Cattails: These plants grow in marshes and ponds, and their tall, brown spikes are a familiar sight.
* Water hyacinths: These invasive plants can quickly cover the surface of water bodies, and their beautiful purple flowers are a striking contrast.
* Duckweed: These tiny plants float on the surface of the water and are a favorite food source for many aquatic animals.
It's important to note that some aquatic plants can also survive in moist soil, but they require water to thrive.