| Australian weasel shark | |
|---|---|
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | Carcharhiniformes |
| Family: | Hemigaleidae |
| Genus: | Hemigaleus |
| Species: | H. australiensis
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| Binomial name | |
| Hemigaleus australiensis | |
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| Range of the Australian weasel shark[1] | |
The Australian weasel shark (Hemigaleus australiensis) is an uncommon species of ground shark in the family Hemigaleidae. It inhabits shallow waters off northern Australia to a depth of 170 m (560 ft); smaller sharks frequent sand and seagrass habitat and shift to coral reefs as they grow older. A slim, drab species reaching a length of 1.1 m (3.6 ft), it has sickle-shaped fins with dark tips on the second dorsal fin and caudal fin upper lobe. Its upper teeth are broad with strong serrations only on the trailing edge. The lateral line along each side is prominent and exhibits a downward curve below the second dorsal fin.
Feeding almost exclusively on octopuses and other cephalopods, the Australian weasel shark mostly hunts near the sea floor. It is viviparous, with the developing embryos nourished through a placental connection and born after a six-month gestation period. This species is productive for a shark, with females bearing litters of 1–19 pups usually twice per year. The Australian weasel shark is caught by trawl and to a lesser extent gillnet and longline fisheries, though not in such numbers that its population is threatened. Thus, it has been listed as Least Concern by the International Union for Conservation of Nature (IUCN).
- ^ a b Simpfendorfer, C.; White, W.T.; Smart, J.J. (2016). "Hemigaleus australiensis". IUCN Red List of Threatened Species. 2016: e.T161539A68624897. doi:10.2305/IUCN.UK.2016-1.RLTS.T161539A68624897.en. Retrieved 11 November 2021.