Rectangular fish with a wide head, upright back fins, and mottled brown patterning.

Round goby

Neogobius melanostomus
Where at Shedd?
At Home on the Great Lakes
Diet Invertebrates and small fishes, prefers molluscs
Size Length: Up to 9.7 inches (24.6 cm)
Type Fishes
Range Caspian, Black, Azov Seas
Habitat Rivers and lakes of eastern Europe, Black and Caspian Seas; invasive in the United States

Did you know?

  1. Swept into ship’s ballast tanks in the Black Sea in Europe, round gobies then got dumped in the Great Lakes.
  2. Look at the round goby’s lower front fins. They’re fused, forming a suction cup that helps the fish stick on rocks in rough waters.
  3. This invasive little fish is quite feisty—chasing native fishes away from their food and nests.
  4. Round gobies multiply quickly, pushing out native sculpins and darters, and eating perch and bass eggs.

IUCN Red List Conservation Status