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Round Goby
Neogobius melanostomus
The round goby is a small, soft-bodied fish with a distinctive black spot on its first dorsal fin. It has large, protruding eyes and its body ranges from 4-10" in length. While juveniles are grey, adult round gobies have grey, black, brown and olive green markings.
Reed Canarygrass
Phalaris arundinacea
Reed canarygrass can reach 5 ft. in height. Its leaves are hairless, reaching up to 10” long and 1⁄4" to 1⁄3" wide. This grass has an extensive root system and spreads primarily through rhizomes, but also produces a high number of seeds.
Red Swamp Crayfish
Procambarus clarkii
Red swamp crayfish are crustaceans that are dark red in color and grow to 2-5 inches in length. The plates on the body of the red swamp crayfish touch on the center of its back distinguishing from the native white river crayfish.
Quagga Mussel
Dreissena bugensis
The quagga mussel is a filter-feeding, freshwater, bivalve mollusk. It is pale toward the end of its hinge and about 3/4" wide.
Purple Loosestrife
Lythrum salicaria
Purple loosestrife is an erect, herbaceous perennial that grows 3-7 ft. tall. It is easily identified by its showy, magenta flowers from July to September. Linear-shaped leaves grow oppositely along square stems. This aggressive plant spreads both vegetatively and by abundant seed dispersal.
Porcelain Berry
Ampelopsis glandulosa
Porcelain berry is a perennial, deciduous vine that can grow up to 20 feet long. It produces small greenish-yellow flowers that develop into hard berries in various shades that mature to a bright blue.
Policemen’s Helmet, Himalayan Balsam
Impatiens glandulifera
Policemen's helmet is an annual herb that produces irregularly shaped, pink to purple colored flowers. Similar to other ‘touch-me-not’ species, this plant produces fruit that bursts at maturity when disturbed.
Poison Hemlock
Conium maculatum
Poison hemlock is biennial herbaceous plant that grows as a rosette in the first year and grows a tall flower stalk in the second. Its fern-like leaves are at least 2 feet long and pinnately compound. The stem is hairless, hollow and speckled with purple.