Saddled swellshark

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Saddled swellshark

Near Threatened  (IUCN 3.1)[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Subdivision: Selachimorpha
Order: Carcharhiniformes
Family: Scyliorhinidae
Genus: Cephaloscyllium
Species:
C. variegatum
Binomial name
Cephaloscyllium variegatum

The saddled swellshark (Cephaloscyllium variegatum) is a rare

oviparous
.

Taxonomy

In 1994,

type specimen is 68 cm (27 in) long adult male, collected from east of Newcastle, New South Wales.[2]

Description

The saddled swellshark reaches a maximum known length of 74 cm (29 in). It has a moderately stocky body and a short, variably wide, and strongly flattened head. The snout is broadly rounded, with the

pectoral fin bases and are shorter than the first three.[2]

The pectoral fins are large and broad, with rounded margins. The first

dermal denticles, each shaped like an arrowhead and bearing a median ridge.[2][3]

The saddled swellshark is brownish or grayish in color above, with 11 darker saddles of varying width over the body and tail and usually no blotches on the flanks. Individuals from tropical waters ("sp. B") tend to have more defined saddles, while those from temperate waters ("sp. C") have fainter saddles and a smattering of lighter flecks. The underside is a plain light color, often with a few darker marks. The juveniles are pale with many dark brown spots.[2]

Distribution and habitat

The saddled swellshark is found off the eastern coast of Australia, as far north as

continental slope at a depth of 115–605 m (377–1,985 ft).[3]

Biology and ecology

Like other members of its genus, the variegated swellshark can inflate itself with water or air as a defensive measure.

oviparous, with its eggs contained in smooth, brownish capsules about 7 cm (2.8 in) long. The egg capsule is thick and rounded, with flanged lateral margins and a pair of horns at each end, which support very long, coiled tendrils. The smallest known free-swimming specimen measured 17 cm (6.7 in) long; males mature sexually at a length of 55–60 cm (22–24 in).[2][3]

Human interactions

The

Near Threatened until more information is available. Currently, little fishing occurs in the region where this shark is found, but should that change it may be vulnerable due to its apparent rarity and benthic habits.[1]

References