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Photo by Center for Great Lakes and Aquatic Sciences Archive, University of Michigan, Bugwood.org
Round Goby

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.

Rudd, Scardinius erythrophthalmus, Niagara River, Photo by Dan Andrews
Rudd

Rudd

Scardinius erythrophthalmus

The rudd is a somewhat stocky, deep-bodied fish with a forked tail. The mouth is distinct, with a steeply angled protruding lower lip. Young rudd compete with native species for habitat and food, such as algae and small invertebrates.

Rusty crayfish, Orconectes rusticus, ID, photo by US Army Corps of Engineers
Rusty Crayfish

Rusty Crayfish

Orconectes rusticus

The rusty crayfish has a dark brown body, distinguishable by dark, rusty spots on either side of the carapace. Rusty crayfish are opportunistic feeders. They are a very aggressive species that often displace native crayfish

Scotch Broom Shrub. Photo Credit: Eric Coombs, Oregon Department of Agriculture, Bugwood.org.
Scotch Broom

Scotch Broom

Cytisus scoparius

Scotch broom is a shrub with small, pea-like yellow flowers that bloom from late May to June. It grows up to 10 feet tall and its green branches are sharply angled with five ridges.

Sea Lamprey

Sea Lamprey

Petromyzon marinus

The sea lamprey is an aggressive parasitic fish that resembles an eel. This species has two dorsal fins, no paired fins, seven gill openings, and a very distinctive disk-shaped mouth with sharp, curved teeth and a rasping tongue. Their scaleless body is a mottled gray to black color that fades to a silver-white coloration on the underside. Adult sea lampreys are generally 12-20 inches in length.

Silver Carp, Hypophthalmichthys molitrix, jumping, photo by Nerissa Michaels
Silver Carp

Silver Carp

Hypophthalmichthys molitrix

Silver carp are deep-bodied fish that are laterally compressed. These large fish, which can reach up to 100 lbs., can breed very rapidly.

Photo by David R. Lance, USDA APHIS PPQ, Bugwood.org
Sirex (European) Woodwasp

Sirex (European) Woodwasp

Sirex noctilio

Woodwasps (or horntails) are large, full-bodied insects about 1'' to 1 1/2" long. Adult females have dark metallic blue or black bodies with orange legs. The male's head and thorax are metallic blue, and the abdomen is orange at the center and black at the base. Adults emerge from July to September.

Brachypodium slyvaticum - slender false brome
Slender False Brome

Slender False Brome

Brachypodium sylvaticum

Slender false brome is a perennial grass that grows in dense clumps. This species has long, drooping, bright green leaves 5-12 mm wide, which can be covered in long, sparse hairs or may be hairless.

Photo by Dave Brenner, Michigan Sea Grant College Program
Spiny Waterflea

Spiny Waterflea

Bythotrephes cederstroemi

Spiny waterfleas are tiny crustaceans less than 1/2" long with long, sharp, barbed tails. Spiny waterfleas collect in gelatinous globs on fishing equipment and lines.

Spotted Knapweed

Spotted Knapweed

Centaurea stoebe

Spotted knapweed is an herbaceous biennial, although it may live for up to nine years. In its first year it grows in a basal rosette with 6-8” leaves. In every year after that, it can grow up to 3 ft. tall with flowers growing at the ends of its many branching stems.

Spotted Lanternfly, Lycorma delicatula, Lateral, photo by Lawrence Barringer, Pennsylvania Department of Agriculture
Spotted Lanternfly

Spotted Lanternfly

Lycorma delicatula

Spotted lanternfly has been found in western New York, in the Buffalo area. The Department of Agriculture and Markets is asking for the public's assistance by reporting sightings.