Malaysia country information

Common names: Circle-blotch pygmy swell shark, Sarawak pygmy swell shark, Swell shark
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Type localities: off Tanjong Sirik, Sarawak, MSR201 (holotype of Cephaloscyllium sarawakensis, 35.4 cm TL, female) (Ref. 75538); off Sarawak, Borneo Island, HUMZ 109126 (holotype of Cephaloscyllium parvum; off Tanjong, Sirik, Sarawak, MSR IPP (M) (holotype of Cephaloscyllium circulopullum, 37.7 cm TL, adult male) (Ref. 75538). Known off Tanjong, Sirik, Sarawak. Rarely caught with deep water trawl nets in Sarawak. Not found din the markets where the study was done (Ref. 75538). Also Ref. 94801.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/my.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Yano, K., A. Ahmad, A.C. Gambang, A.H. Idris, A.R. Solahuddin and Z. Aznan, 2005
National Database:

Common names from other countries

Sarawak pygmy swellshark, Circle-blotch pygmy swell shark, Yu-buntal Sarawak, ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (sharks and rays) > Carcharhiniformes (Ground sharks) > Scyliorhinidae (Cat sharks) > Scyliorhininae
Etymology: Cephaloscyllium: cephalus, from kephale (Gr.), head, referring to its very broad and depressed head; skylion, Greek for dogfish or small shark. (See ETYFish); sarawakense: -ensis, Latin suffix denoting place: Sarawak, Malaysia, type locality. (See ETYFish).

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; benthopelagic; depth range 100 - 200 m (Ref. 94801). Subtropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Pacific Ocean: South China Sea (western south Taiwan, Hong Kong, Gulf of Tongking, Vietnam, Malaysia).

Length at first maturity / Size / Weight / Age

Maturity: L_m 37.5, range 35 - 40 cm
Max length : 39.7 cm TL male/unsexed; (Ref. 75582); 44.1 cm TL (female)

Short description Morphology | Morphometrics

This small-sized shark is distinguished by the following characters: adults with two distinct and wide brown saddle blotches before first dorsal fin while juveniles with 3; first saddle immediately behind eye, second over posterior 1/3 of base and inner margin of pectoral fin, the third a little before first dorsal fin, which fades with growth; dark lateral circular to oblong blotches above gill openings and on lateral side of trunk; young individuals with many polka dots on body and fins; anterior nasal flap triangular without an elongate flap (Ref. 98601).

All specimens were collected by trawl nets near the edge of the continental shelf (Ref. 75538).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Compagno, Leonard J.V. | Collaborators

Yano, K., A. Ahmad, A.C. Gambang, A.H. Idris, A.R. Solahuddin and Z. Aznan, 2005. Sharks and rays of Malaysia and Brunei, Darussalam. SEAFDEC-MFRDMD/SP/12. Kuala Terengganu. Sharks and Rays Malaysia and Brunei:557 pp. (Ref. 75538)

IUCN Red List Status (Ref. 130435)

Critically Endangered (CR) (A2d); Date assessed: 20 May 2020

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO(Publication : search) | FishSource |

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Estimates based on models

Preferred temperature (Ref. 115969): 17.5 - 23.6, mean 20.2 (based on 66 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00263 (0.00139 - 0.00497), b=3.21 (3.04 - 3.38), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 4.0 ±0.5 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Low, minimum population doubling time 4.5 - 14 years (Preliminary low fecundity).

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (34 of 100).

Cephaloscyllium sarawakense Yano, Ahmad & Gambang, 2005