Round gobies are bottom-dwelling fish that perch on rocks. They are aggressive fish and voracious feeders. They will vigorously defend spawning sites in rocky or gravel habitats. Gobies also have a well-developed sensory system that enhances their ability to detect water movement. This allows them to feed in complete darkness, and gives them a big advantage over other fish in the same habitat.
The Goby pictured here is a freshwater species with marine relatives. The marine Goby are quite common on reefs where they clean parasites off of groupers and other large fish.
Photo and text provided by The University of Wisconsin Sea Grant College Program.
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