Tadpole Goby
Lophogobius cyprinoides
Type: saltwater, benthic
Physical Characteristics
Bulbous head with a tapering, translucent body, large dark eyes, and distinctive dark pelvic fins that are joined to form a suction disc. The body is often pale or translucent with small dark spots.
Habitat & Distribution
Coastal waters, estuaries, and mangroves often found in silty or muddy bottoms. They are primarily found in the Western Atlantic ranging from Florida to South America.
Size & Weight
Typically ranges from 2 to 5 centimeters in length. Maximum weight is usually less than 10 grams.
Similar Looking Species
Bathygobius soporator (Frillfin Goby). Distinguished by the Lophogobius having a fleshy crest on the head and more translucent body in larval stages.
Ecological Role
Serves as a vital link in the food chain by consuming small invertebrates and being preyed upon by larger coastal fish and wading birds.
Diet
Opportunistic carnivore feeding on small crustaceans, amphipods, polychaete worms, and other tiny benthic invertebrates.
Behavior
Primarily solitary and benthic (bottom-dwelling). Larval stages are often pelagic and attracted to light, while adults are territorial and reside in burrows or crevices.
Reproduction
Males guard nests in crevices or empty shells where females deposit eggs. Many undergo a pelagic larval stage before settling on the sea floor as juveniles.
Conservation Status
Least Concern (IUCN); population trends are generally stable throughout their native range.
Identification Tips
Look for the suction-cup pelvic fins and the 'tadpole' silhouette created by a large head and sharply tapering tail.
Interesting Facts
Like many gobies, their pelvic fins are fused into a disc that allows them to cling to rocks and substrates even in areas with significant water movement.
Identified on: 5/20/2026
Mode: Standard