Aquatic plants are also known as Hydrophytes. Hydrophytes are plants that are adapted to live in aquatic environments such as rivers, lakes, and ponds. These plants have unique adaptations that allow them to survive and thrive in water.

Adaptations of Hydrophytes:
1. Root System: Hydrophytes have specialized root systems that allow them to anchor themselves in the substrate and absorb nutrients from the water.

2. Stem Structure: Hydrophytes have stems that are flexible and can bend with the flow of water. This helps them to avoid damage from strong currents.

3. Leaf Structure: Hydrophytes have leaves that are adapted to live in water. They are typically thin and flexible, and have a large surface area to help them absorb sunlight and nutrients.

4. Reproduction: Hydrophytes have adapted to reproduce in water. Some plants have flowers that float on the surface of the water, while others have seeds that can float and be carried by the water.

Types of Hydrophytes:
1. Emergent Plants: These are plants that grow in shallow water and have their roots anchored in the sediment. Examples include cattails and bulrushes.

2. Floating Plants: These are plants that float on the surface of the water and have their roots suspended in the water. Examples include water lilies and duckweed.

3. Submerged Plants: These are plants that grow completely underwater and have their roots anchored in the sediment. Examples include eelgrass and pondweed.

In conclusion, Hydrophytes are aquatic plants that have adapted to live in water. They have unique adaptations that allow them to survive and thrive in aquatic environments.