Fish use of coastal saltmarsh wetlands have been documented for many parts of Australia with a notable exception of Tasmania. Our study primarily aimed to document the diversity, density and patterns of fish use in the Circular Head coast saltmarshes, north north-west Tasmania. We also explored any effect of saltmarsh habitat fragmentation on fish species diversity and density by sampling concurrently at nearby paired sites of predominantly unaltered and altered saltmarshes. Fish were caught using buoyant floorless pop nets (each covering an area of 25 m-2 with 5 m long x 1 m high walls) at the six paired sites across three locations over successive neap and spring tide cycles. A total of 851 fish from 11 species were caught in 37 of the 48 net releases at a mean density of > 72 fish per 100 m-2. Three of these species, Aldrichetta forsteri, Arripis truttaceous and Rhombosolea tapirina, are targeted by recreational and commercial fishers and contributed close to 20 % of the total catch numbers. Although there were minor differences in fish assemblages between locations, there was no significant difference between the unaltered and altered marshes, including those areas behind naturally breached levees. This provides an indication that any rehabilitation of saltmarshes by restoring tidal flows will deliver benefits for fish productivity through expanded habitat.