Family: Triakidae – Houndsharks
Common Name– Ground Sharks
Common Name– Houndsharks
Status: IUCN Red List DATA DEFICIENT
Average Size and Length: Adults have been measured at 86-94.2 cm/2.8-3 feet, with the max length of a male at 94.2 cm/3 feet and a female at 111.6 cm/3.6 feet.
Teeth and Jaw: There are buccopharyngeal denticles cover entire palate and floor of mouth; it has pavement like teeth great for crushing. There are about 69/73 teeth rows.
Tail: Juveniles have a caudal fin with distinctive whitish posterior margins.
Demographic, Distribution, Habitat, Environment and Range: It is found in the western Pacific in Australia. They are tropical benthopelagic at a range between 171-1,322 feet.
Aesthetic Identification: The Eastern Spotted Gummy shark looks similar to the Gummy shark and the Western Spotted Gummy shark, but their ranges do not overlap. It is a somewhat large species. They are pale greyish with many small, often indistinct, semi-regular, diffuse-edged white spots on head and body. The inter-gill membranes are much darker dorsally than ventrally. The bases and inner lobe of the dorsal fins in juveniles (<400 mm TL) are not strongly contrasted to distal part of fin. The inner lobe is pale-edged. It has tall dorsal fins and its posterior margin is directed poster-oventrally from top to bottom and not upright distally. The first dorsal-fin base is 1.6-2.0 times the anal-caudal space. The long claspers of adult males are slender and strongly depressed, with the inner length about 9-10% of the total length, extending to just the anterior of the second dorsal-fin origin. The insertion of the anal fin is usually over its apex.
Biology and Reproduction: There are 78- 94 precaudal vertebral centra and 35-39 monospondylous centra. Reproduction is unknown.
Behavioral Traits, Sensing and Intelligence: Unknown.
Eastern Spotted Gummy Shark Recorded Attacks on Humans: Not a threat to humans.