Chordas Pond, located in Shelton, Connecticut, is a 2.5-acre waterbody with a maximum depth of approximately 2 meters. This survey represents the second aquatic vegetation assessment conducted at the pond by the Connecticut Agricultural Experiment Station’s Office of Aquatic Invasive Species (CAES OAIS). The initial survey was completed on July 5, 2017, and the most recent survey was conducted on July 2, 2025.

During the 2025 survey, CAES OAIS documented nine native aquatic plant species, and no invasive aquatic species were observed. The most abundant species included low watermilfoil (Myriophyllum humile), watershield (Brasenia schreberi), swamp loosestrife (Decodon verticillatus), and primrose-willow (Ludwigia spp.). Less frequently observed species included bur-reed (Sparganium spp.), common duckweed (Lemna minor), cattail (Typha spp.), rush (Juncus spp.), and spikerush (Eleocharis spp.).

In 2017, low watermilfoil dominated the littoral zone of the pond. By 2025, low watermilfoil remained abundant but was less dominant, as watershield and swamp loosestrife expanded substantially. Together, these three species now dominate the littoral zone. Several species documented during the 2017 survey were not observed in 2025, including leafy pondweed (Potamogeton foliosus), snailseed pondweed (Potamogeton bicupulatus), water starwort (Callitriche spp.), and white water lily (Nymphaea odorata). Conversely, cattail, rush, spikerush, and swamp loosestrife were documented in 2025 but were not observed during the 2017 survey.