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• Taxonomy
• Physical Description
• Distribution
• Habitat
• Similar Species
• Bibliography
• More Info
• Notes
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Overview:

Family: Houndsharks; Found on the continental shelf and slope. Water temperature: 16-25¦C. Oxygen level: 0.2-2.4 ppm. Feeds on bony fishes (mostly lanternfishes) and cephalopods. Sexual dimorphism by size exists. Viviparous (with a yolk-sac placenta), with probably 2 to 10 young in a litter. Utilized fresh for human consumption.

Taxonomy

Unambiguous Synonyms:

1. Eugaleus omanensis Norman, 1939
2. Galeorhinus omanensis (Norman, 1939)
3. Jago omanensis (Norman, 1939)

Notes:

Name Status: Accepted Name.

Physical Description

Family Triakidae:

Small to moderate-sized sharks with horizontally oval eyes, nictitating eyelids, anterior nasal flaps, two large-sized, spineless dorsal fins and an anal fin, the first dorsal base well ahead of pelvic bases. Species found in all warm and temperate coastal seas. They feed primarily on bottom and midwater invertebrates and bony fishes.

The family Triakidae belongs to the Class Elasmobranchii (sharks and rays) and the Order Carcharhiniformes. It contains 9 genera and 34 species. It may be found in Marine environments and is primarily Marine. Members of this family are not used in the aquarium trade. Reproductively, most members of this family are bearers. The main mode of swimming of adult fish in this family is subcarangiform. Compared with other fish, the activity level of this family tends to be sluggish. Members of this family have been dated back to the Eocene epoch of the Tertiary period. Etymology of this family name: Greek, triakis = thrice

Images:

Distribution

Range and Population

Indo-West Pacific

Western Indian Ocean: Red Sea, Gulf of Aqaba^[1] and Gulf of Oman to Pakistan and southwestern India. A low-finned, somewhat short-headed Iago is largely sympatric with Iago omanensis at least off southwestern India, and in the Bay of Bengal there is possibly a dwarf, omanensis-like Iago that may or may not be distinct.

Habitat

Biome

Saltwater. Bathydemersal.

Similar Species

Members of the genus Iago:

There are approximately 2 species and subspecies in this genus: I. garricki (Llongnose Houndshark) · I. omanensis (Bigeye Hound Shark)

Members of the genus Alopias:

There are approximately 13 species and subspecies in this genus: A. abdutus · A. aff. alabamensis · A. alabamensis · A. exigua · A. latidens · A. leensis · A. pelagicus (Fox Shark) · A. superciliosus (Big Eye Thresher Shark) · A. supersiliosus · A. vulpimus · A. vulpinis · A. vulpinnus · A. vulpinus (Big-Eye Thresher)

Bibliography

• Compagno, L.J.V. (1984). FAO species catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2. Carcharhiniformes. FAO Fish. Synop. (125, Vol. 4, Part 2), 655 p.
• Compagno, Leonard J. V. 1984. Sharks of the World: An annotated and illustrated catalogue of shark species known to date. FAO Fisheries Synopsis, no. 125, vol. 4, pt. 2. Food and Agriculture Organization of the United Nations. Rome, Italy.
• Eschmeyer, William N., ed. 1998. Catalog of Fishes. Special Publication of the Center for Biodiversity Research and Information, no. 1, vol 1-3. California Academy of Sciences. San Francisco, California, USA. 2905. ISBN: 0-940228-47-5.
• NODC: Typifies
• Randall, J.E. (1995). Coastal fishes of Oman. University of Hawaii Press, Honolulu, Hawaii. 439 p.
• Sommer, C., W. Schneider and J.-M. Poutiers (1996). FAO species identification field guide for fishery purposes. The living marine resources of Somalia. FAO, Rome. 376 p.

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Notes

Contributors:

• Brands, S.J. (comp.) 1989-2006. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed October 8, 2006.
• Compagno, Leonard J.V. (from FishBase).
• Global Biodiversity Information Facility. Accessed March 02, 2008. http://www.gbif.org Mediated distribution data from 4 providers.

Data Sources:

Accessed through GBIF Data Portal March 02, 2008:

• FishBase: FishBase DiGIR Provider - Philippine Server
• Institute of Marine and Coastal Sciences, Rutgers University: iziko South African Museum - Shark Collection
• Museum national d'histoire naturelle: Ichtyologie
• OZCAM (Online Zoological Collections of Australian Museums) Provider: Online Zoological Collections of Australian Museums
• Senckenberg: Collection Pisces

Identifiers:

• Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 160551
• Fishbase Species ID: 5929
• Global Biodiversity Information Facility Taxonkey: 112173
• Zipcode Zoo Species Identifier: 113860

Footnotes:

1. Klausewitz, W. (1994). Comparative studies on the vertical distribution of bathybenthic deep-sea fishes of the Red Sea. Proc. IPFC 4:462-468.