Their small size often make this fish difficult to identify. This family contains about 1800 species, about 400 of these are in Australia, most of which are marine with only 6 tropical Australian species restricted to freshwaters.

YellowfinGoby Acanthogobius flavimanus Schlegel

Other names: None

Description: Can reach up to 30 cm.

Distribution: Is mainly established in the marine waters of Sydney Harbour and Botany Bay, however has been recorded in freshwater reaches of the Hawkesbury River, New South Wales.

Natural History: This species is native to inland waters of Asia, the pacific north west and the Pacific western central regions. It was first accidentally introduced into Australia around 1971 from Japan.