Which of the following species is known as curly-leaf pondweed?

Curly-leaf pondweed is identified scientifically as Potamogeton crispus. This aquatic plant is commonly found in freshwater environments and is characterized by its distinctive curly or wavy leaf shape, which can help in identifying it in the field. Curly-leaf pondweed typically emerges early in the spring and can form dense mats that may disrupt the aquatic ecosystem, affecting water flow and light penetration.

In addition to its identification, understanding Potamogeton crispus's behavior in aquatic environments is crucial for managing its impact on native species and water quality. Other species mentioned, while related to aquatic ecosystems, do not share this particular characteristic or name. This highlights the importance of accurate species identification in aquatic pest management.