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ISRA FACTSHEETS

AUSTRALIA AND SOUTHEAST INDIAN OCEAN

ISRA FACTSHEETS

AUSTRALIA AND SOUTHEAST INDIAN OCEAN

Maatsuyker Islands ISRA

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Maatsuyker Islands ISRA

Maatsuyker Islands

Summary

Maatsuyker Islands is located off the southern coast of Tasmania, Australia. The area encompasses multiple islands sitting ~35 km from mainland Tasmania. The area is characterised by rocky reefs, sponges, and soft coral. It is influenced by the Zeehan Current, strong winds, and significant swells. The area overlaps with Tasman Fracture Marine Protected Area. Within this area there are: range-restricted species (Orange Spotted Carpetshark Asymbolus rubiginosus).

Maatsuyker Islands

DESCRIPTION OF HABITAT

Maatsuyker Islands is located off the southern coast of Tasmania, Australia. The area is located around a group of islands sitting ~35 km from mainland Tasmania, which includes Maatsuyker Island, De Witt Island, Mewstone Island, and Round Top Island. It is situated within the Tasman Fracture and upon the continental shelf. The area is characterised by rocky reefs, coarse sand, sponges, and soft coral (NVA 2025).

The area is influenced by the Zeehan Current (Red Map 2025), strong winds, and a lack of shelter. The annual mean sea surface temperature is 11°C (BoM 2025). Significant swells, exceeding 10 m, on top of 6 m seas, influence this area multiple times a year (Wong et al. 2025).

The area overlaps with Tasman Fracture Marine Protected Area (Parks Australia 2025).

This Important Shark and Ray Area is benthic and is delineated from inshore and surface waters (0 m) to 150 m based on the bathymetry of the area.

CRITERION B

RANGE RESTRICTED

This area holds the regular presence of Orange Spotted Carpetshark as a resident range-restricted species.

Synthesised data from the GlobalArchive and The Fish Collective for Baited Remote Underwater Video System (BRUVS) were extracted after quality control was undertaken using CheckEM (GlobalArchive 2025; The Fish Collective 2025; Gibbons et al. in press). In this area, 51 BRUVS were deployed in April 2015 (n = 3 days of effort) and March 2021 (n = 4 days) (Monk et al. 2016; Perkins et al. 2022; GlobalArchive 2025; The Fish Collective 2025). In 2015, seven Orange Spotted Carpetshark were observed in seven BRUVS surveys between 111–129 m depth. In 2021, 13 animals were observed in 13 BRUVS surveys between 108–126 m depth (Monk et al. 2016; Perkins et al. 2022; GlobalArchive 2025; The Fish Collective 2025). There are only two years of data available since the area is remote and infrequently surveyed. Still, this species has been observed in both years and all months of surveys undertaken in this area. The relative importance of this area is highlighted by the lack of observations from BRUVS deployed off the south coast of Tasmania. This is despite there being similar effort in adjacent areas (46 BRUVS deployments in 8 days across three months in two years). In adjacent areas, Orange Spotted Carpetshark were not observed or were observed in fewer numbers (n = 2 individuals). In other parts of Tasmania, there were no clusters observed via BRUVS across multiple years (Monk et al. 2016; Perkins et al. 2022; GlobalArchive 2025; The Fish Collective 2025). This area has the only known cluster of regular and predictable observations of Orange Spotted Carpetshark in Tasmania, across more than one year (Monk et al. 2016; Perkins et al. 2022; GlobalArchive 2025; The Fish Collective 2025). Orange Spotted Catsharks are restricted to the Southeast Australian Shelf Large Marine Ecosystem.

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