Water-thread pondweed, also known as variable-leaf pondweed, is a perennial aquatic plant distinguished by its two distinct leaf types. The floating leaves are oval-shaped and have a leathery texture, while the submerged leaves are thin, flexible, and longer than those on the surface. This plant is commonly found in slow-moving or still waters, where it provides habitat and food for aquatic life. While beneficial to ecosystems, water-thread pondweed can spread rapidly in nutrient-rich environments, sometimes requiring management to prevent excessive growth that may interfere with water flow and recreation.