Coral catshark (Atelomycterus marmoratus)

Coral catshark on coral reef
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Coral catshark fact file

Coral catshark description

GenusAtelomycterus (1)

The coral catshark is a small, slender shark with a narrow head and the elongated, cat-like eyes typical of the catshark family (2) (3) (4). The body is distinctively and attractively marked, with a mottled pattern of dark marks and white spots on a brown background. The underside is white (2) (4). The coral catshark possesses two spineless dorsal fins, the first of which is in line with the middle of the pelvic fins, about midway along the body, and also a smaller anal fin. The tail (caudal) fin lacks a strong lower lobe (2) (3) (4) (5).

Chien Corail.
Length: up to 70 cm (2)

Coral catshark biology

Although a widespread and common species, surprisingly little is known about the biology of the coral catshark, with virtually no information available on its diet, growth or reproduction (1) (2) (4). However, like other catsharks it is likely to feed on invertebrates and perhaps small fish, and it is harmless to humans (3) (4). The coral catshark is thought to reach sexual maturity at around 50 centimetres in length, and lays eggs rather than giving birth to live young (2) (4) (5). The egg case of this species is rectangular and elongated, with short tendrils at one end, and is dark brown in colour, with a smooth surface (6).


Coral catshark range

The coral catshark has a widespread distribution in the tropical Indian and western Pacific Oceans, occurring from Pakistan and India to Malaysia, Indonesia, the Philippines, Papua New Guinea, southern China and Japan (1) (2) (4). Previous records from Australian waters are now thought to be of separate species (1).


Coral catshark habitat

An inshore species, the coral catshark inhabits coral reefs, where it is thought to live in crevices and holes in the reef (1) (2) (4).


Coral catshark status

Classified as Near Threatened (NT) on the IUCN Red List (1).

IUCN Red List species status – Near Threatened


Coral catshark threats

The coral catshark is still widespread and relatively abundant, and generally forms only a minor part of the catch of inshore fisheries (1) (2). However, increasing fishing pressure is likely to represent a significant threat, and the coral catshark may face further pressure from habitat destruction, as a result of dynamite fishing, coral mining and pollution. A lack of population and fisheries data for this species makes accurately assessing its status somewhat difficult (1). It appears to be relatively common in the live aquaria trade, but the potential impacts on the wild population are unknown.


Coral catshark conservation

Recreational landings, but not fisheries catch, are prohibited for the coral catshark in Malaysian waters (7), but there are no other known conservation measures currently in place for the species. The IUCN recommends that habitat protection and education measures should be considered for this and other coral-dwelling species in the region. The collection of more detailed fisheries data will also be vital if appropriate conservation action is to be taken for this attractive small shark (1).

View information on this species at the UNEP World Conservation Monitoring Centre.

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Anal fin
In fish, an unpaired fin on the under surface of a fish, behind the anus.
Dorsal fin
The unpaired fin found on the back of the body of fish, or the raised structure on the back of most cetaceans.
Animals with no backbone, such as insects, crustaceans, worms, molluscs, spiders, cnidarians (jellyfish, corals, sea anemones), echinoderms, and others.
Pelvic fins
In fish, the pair of fins found on the underside of the body.


  1. IUCN Red List (July, 2009)
  2. Compagno, L.J.V. (1984) Sharks of the World. An Annotated and Illustrated Catalogue of Shark Species Known to Date. Vol. 4: Part 2: Carcharhiniformes. Food and Agriculture Organization of the United Nations, Rome. Available at:
  3. Randall, J.E., Allen, G.R. and Steene, R.C. (1997) Fishes of the Great Barrier Reef and Coral Sea. University of Hawaii Press, Honolulu, Hawaii.
  4. Shark Foundation (July, 2009)
  5. ReefQuest Centre for Shark Research (June, 2009)
  6. Bor, P.H.F., van Oijen, M.J.P. and Magenta, C. (2003) The egg capsule of the coral cat shark, Atelomycterus marmoratus (Bennett, 1830) (Chondrichthyes: Scyliorhinidae). Zool. Med. Leiden, 77: 325 - 330.
  7. Fowler, S.L., Cavanagh, R.D., Camhi, M., Burgess, G.H., Cailliet, G.M., Fordham, S.V., Simpfendorfer, C.A. and Musick, J.A. (2005) Sharks, Rays and Chimaeras: The Status of the Chondrichthyan Fishes. Status Survey. IUCN/SSC Shark Specialist Group, IUCN, Gland. Available at:

Image credit

Coral catshark on coral reef  
Coral catshark on coral reef

© Wolfgang Pölzer

Wolfgang Pölzer


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