Spotted Estuary Smooth-Hound

Mustelus lenticulatus

The Spotted Estuary Smooth-hound, also known as the rig or lemonfish, is a houndshark found primarily around New Zealand, particularly on continental shelves and in estuaries. It can also be spotted near the Kermadec Islands and has been reported in southern Australia. Males typically reach up to 125 cm, while females can grow as long as 151 cm. This shark is characterized by its smooth skin and is often confused with the gummy shark from Australia due to their close relation. Divers may encounter this species in coastal waters, often in depths ranging from 0 to 400 meters, although it has been recorded as deep as 860 meters. It is a demersal species, usually found close to the ocean floor, and is known for forming schools separated by size and sex. The Spotted Estuary Smooth-hound primarily feeds on crustaceans, with a preference for crabs. Reproduction in this species is ovoviviparous, with embryos feeding on yolk before birth. Females give birth to between 2 and 37 young, each measuring between 20 and 32 cm at birth. The IUCN has classified this species as Least Concern. However, it is commercially fished in New Zealand, where it is commonly served as lemonfish in fish and chip shops.