Coastal stingaree vs Fat Sand Rat

Urolophus orarius compared with Psammomys obesus

Key Differences

• Coastal stingaree is Endangered while Fat Sand Rat is Least Concern.

Taxonomic Classification

Rank	Coastal stingaree	Fat Sand Rat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Mammalia (Mammals)
Order	Myliobatiformes (Myliobatiformes)	Rodentia (Rodents)
Family	Urolophidae	Muridae (Mice & Rats)
Genus	Urolophus	Psammomys
Species	Urolophus orarius	Psammomys obesus

Evolutionary Relationship

Coastal stingaree and Fat Sand Rat share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Coastal stingaree

EN — Endangered

Fat Sand Rat

LC — Least Concern

Physical Characteristics

Attribute	Coastal stingaree	Fat Sand Rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Coastal stingaree

Fat Sand Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Coastal stingaree

Coastal stingaree (Urolophus orarius) is a small batoid ray in the family Urolophidae, endemic to shallow coastal waters of southern Australia, particularly along the coasts of South Australia, Victoria, and Tasmania. Like other stingarees, it has a rounded disc, a short tail armed with one or two venomous spines, and lacks a distinct rostrum. It inhabits sandy and muddy nearshore substrates in depths typically less than 30 metres, where it forages for polychaete worms, crustaceans, and small molluscs buried in the seabed. Females are ovoviviparous, giving birth to small litters of live young following internal development. Coastal stingaree is assessed as Endangered by the IUCN, driven by its restricted range, slow reproductive rate, and significant bycatch in inshore commercial and recreational fisheries operating across southern Australian coastal waters. Bottom trawling, prawn trawling, and gillnetting are identified as major threats. The species receives limited targeted conservation attention and is not currently the subject of specific fisheries management measures. Its small home range and coastal distribution make it especially vulnerable to localised fishery impacts.