Ctenacis fehlmanni 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Chondrichthyes Carcharhiniformes Proscylliidae

Scientific Name: Ctenacis fehlmanni
Species Authority: (Springer, 1968)
Common Name(s):
English Harlequin Catshark
French Requin Chat Arlequin
Spanish Tollo Coludo Arlequín
Triakis fehlmanni Springer, 1968
Taxonomic Source(s): Weigmann, S. 2016. Annotated checklist of the living sharks, batoids and chimaeras (Chondrichthyes) of the world, with a focus on biogeographical diversity. Journal of Fish Biology 88(3): 837-1037.

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2009
Date Assessed: 2008-12-01
Assessor(s): Cronin, E.S.
Reviewer(s): Valenti, S.V. & Fowler, S.L. (Shark Red List Authority)
The Harlequin Catshark (Ctenacis fehlmanni) is a small, (to at least 46 cm TL) outer shelf dwelling catshark, known only from 70-170 m depth off Somalia. Little is known about the biology or ecology of this species. This species may be taken as bycatch of multi-species fisheries but no information is currently available from the area in which it occurs. Insufficient information is available to assess this species beyond Data Deficient and research is required on catch levels, life-history and threats to enable reassessment.

Geographic Range [top]

Range Description:Western Indian Ocean: Somalia (Compagno in prep). Type locality is Southwest of Cape Guardafui, Somalia (Springer 1968).
Countries occurrence:
FAO Marine Fishing Areas:
Indian Ocean – western
Additional data:
Lower depth limit (metres):170
Upper depth limit (metres):70
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Known only from a few specimens (Compagno et al. 2005) and therefore population size is unknown.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is found on the outer continental shelf, where it is thought to occur from 70-170 m depth (Springer 1968).

Maximum total length (TL) is reported at 46 cm (Compagno et al. 2005). The mode of development of this species is uncertain, though the presence of a very thin-walled (rather than thick-walled) large egg-case in each uterus of the holotype suggests that the species may be ovoviviparous rather than oviparous, and if this is the case, the holotype is thought to have had two young in a litter (Compagno 1984).

Threats [top]

Major Threat(s): This species is small and would be vulnerable to capture in demersal trawl fisheries and some net fisheries. Sharks are reported to play an important role in both the artisanal and traditional Somali fisheries, although no information is available on the catch species composition and other demersal species are reportedly lightly exploited (FAO 2007). This species is very small and is probably not targeted, although it may be subject to bycatch. Although little specific information is available on artisanal fisheries in Somali waters, small-scale fisheries in nearby countries (such as Oman) tend to be opportunistic, using a variety of net-types to catch as much as possible, and similar practices may be used in Somalia (A. Henderson pers. comm. 2007).

Conservation Actions [top]

Conservation Actions: No management or conservation efforts are currently in place. Information on biology, ecology and importance in fisheries is required to further assess status and any future conservation needs. If taken, catches require monitoring, particularly as deeper fisheries expand worldwide.

The development and implementation of management plans (national and/or regional e.g., under the FAO International Plan of Action for the Conservation and Management of Sharks: IPOA-Sharks) are required to facilitate the conservation and management of all chondrichthyan species in the region.

Citation: Cronin, E.S. 2009. Ctenacis fehlmanni. The IUCN Red List of Threatened Species 2009: e.T161499A5437452. . Downloaded on 22 May 2017.
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